Chapter 1
Edinburgh – 9 November 1779
Professor Joseph Black considered himself thirteen years too old for sneaking around cellars investigating rumours of slain medical students.
“Did you check under that chair, Joe?”
Yet here he was. Black sighed. “Not yet.”
His companion and fellow faculty member, William Cullen, paused his rummaging through a cobweb-choked dispensary cabinet. The meagre light from scrounged together candle stubs made it impossible to read his expression.
“Did you hear something?” Black asked. Cullen had the advantage of better hearing; Black had better eyesight. Not that either counted for much at their age.
Amused, Cullen shook his head. “I told you, no one’s summoning the Town Guard in response to our presence.” He patted his coat pocket, which gave a satisfying clink. “And if they do, it’s a quick misunderstanding to rectify.”
Black couldn’t argue with that. The Edinburgh Town Guard weren’t known for their zeal apprehending criminals, excluding those misfortunate enough to murder a man outside the Guardhouse the day they left their purse at home.
The two professors had simply stridden into the College of Surgeons and descended into the cellars, talking softly as if preoccupied with cerebral affairs. No one questioned their business, and it was unlikely anyone could overhear them through these thick walls.
“See if there’s any traces of blood on that dissecting table, Joe. Fresh blood, I mean.”
“I already inspected that table. It’s impossible to tell.” The air here was stale and thick with mildew. While there were signs this storage space was recently occupied—the presence of fresh candles and an order to the row of lidless leech jars—unless a large group of individuals came in regularly, it would be impossible for their activities to replace the scent of disuse. They would need to spill a lot of bodily fluids.
“Well, perhaps one of them dropped written notes?”
That seemed improbable.
“How much do you know about the victim this time, William?” Cullen had hurried him from the college grounds ten minutes ago, his whispers struggling to keep pace. Before that, Black was ignorant of anything amiss.
“Next to nothing, Joe. Ha! I learned the boy was dead only an hour before you did. Questioned a few students on my way to you, but no one knew who attended to him in the Infirmary yesterday, and I’m stuck visiting patients across town all afternoon. Since my next visit is just along Nicolson Street and she’s recuperating well, I thought we’d use what little time I had to search the suspects’ domain before your morning class began. Before they return and remove all evidence.” Cullen cocked his head, listening for unwelcome footsteps in the corridor.
If someone from the College of Surgeons did deign to enquire what the venerable professors were doing down here it would—as usual—fall to Black to come up with a convincing explanation. If the individuals responsible for the dead student returned and found the duo poking around in their secret quarters…
Well, he hadn’t thought that far ahead.
Black rubbed his lower back. “I doubt we’ll find proof they conducted any procedure here.” Was it a medical procedure? Or was “ritual” a more apt descriptor? He’d heard enough of Cullen’s theorising on the distinction these past months, but nothing in this cramped space brought clarity. If the student died because of what happened to him here yesterday—still conjecture on Cullen’s part—those responsible would have scrubbed the place clean before their victim reached the Infirmary.
Right now, they were clutching a handful of truths and rumours.
“Once my ten o’clock lecture is over, I’m engaged most of the afternoon too,” Black admitted. There was a row of brown glass bottles on the shelving in the corner. He shook them in turn. All empty. This was useless. “How sure are you of the culprit, William? There’s been a nasty fever spreading through town these past weeks.”
“Oh, it has to be him and his associates. The student in question was sympathetic to his views.”
Black preferred simple solutions to problems. There was an elegance in simplicity. One or two students always fell to fever in the winter months: the consequence of dwelling in a crowded city. Of course, Cullen tended towards the classical in his outlook. That’s why he favoured ornate solutions.
“I don’t dispute your rationale for searching the Surgeons’ buildings,” Black began, “since we know the suspects congregate on the premises, but uncovering a half-empty poison bottle won’t help us. The intent behind the deaths is no clearer than it was in August, and the other faculty aren’t going to believe us unless we can convince them these deaths were deliberate.”
“Any fool can see they’re deliberate,” Cullen said, almost knocking over a candle as he raised his hand. “The faculty are choosing wilful blindness.”
“Well, if we prove intent and a compelling motivation, they’ll find your suspicions harder to dispute.” Black realised he should have said “our suspicions”, but Cullen didn’t seem to notice so he ploughed on. “Right now we’re chasing day-old echoes. Our best hope is to get wind of the next casualty before it becomes a fatality. Catch the culprits before they destroy the ephemera.”
It wasn’t that Black disbelieved his colleague: it was more that he possessed an absence of fixed belief on the matter. But he didn’t like seeing Cullen this agitated.
Cullen took a step closer. “You really want to bring the students into this, Joe? That’s what you’re suggesting, isn’t it? No professor will cooperate with us; neither of us has the time to maintain the necessary levels of vigilance.”
“We might not need more than one student,” Black mused. His colleague’s posture indicated the inspection was abandoned. Just as well—he’d finish prepping that jug of aqua regia before class began. “One student we can put the time in to train might be more useful than a squabbling crowd of them anyway.”
“I barely have the time to hunt and train students either. But yes, securing a good one could be worth the effort…”
Chapter 2
“Stephens—for God’s sake, make the fire more lively.”
Hiding his displeasure at being ordered about by someone younger than him, George Stephens slipped off the sofa and crouched by the parlour fireplace, flicking his coat out from under his feet and moving a cracked oil lamp to one side. He jabbed the fire—more ashy smoulder than blaze—with a crooked poker. With the venerable professors almost at the door, preparing the parlour fell on the lodger easiest to order around.
Behind him, the remaining student lodgers filed into the room. It seemed he wouldn’t have a choice about being present at this social call. He’d first worried it’d be presumptuous to stay when the professors—who were, strictly speaking, calling upon fellow lodger Edward—arrived, since Edward was months away from completing his medical dissertation and had known the two men for years, and George didn’t know them at all. Then he worried that retiring to his room or contriving an errand would be a greater snub to such eminent guests.
“You said Doctors Cullen and Black were almost here?” he asked Edward, prodding the fire. The flames edged higher, and George was rewarded with their warm touch on his cheek and brow.
He wanted to tell Edward that if he was so concerned with the state of the hearth he should administer to it himself. He’d seen Edward take such remarks from his friends in stride, but would George come across as rude?
“They’re waylaid four doors down,” Edward said. “A group of bairns were playing with too much spirit on the street corner: Dr Cullen’s admonishing them for their carelessness.” He shrugged, smoothing his curly brown hair. “At least there’s now a warm room waiting for them.”
It would have been nice to know I had several minutes’ leeway before I rushed to fix the hearth, George thought. Shame Edward didn’t view such helpful information as necessary for him to complete the task.
There was a time, strictly speaking only a few months prior, but it belonged to an age of innocence, when George believed his military experience would garnish cachet with other Edinburgh medical students. Instead, he was greeted by awkward silences when the students he spoke to realised he never held officer status. After learning that, most deposited him in the same category as “manservant” or “costermonger”.
The lodgings owner shuffled into the parlour. She was a small, white-haired woman who subsisted, as most Edinburgh landladies did, on overcooked vegetables and other people’s private business. George was surprised at the liveliness in her posture, like a blackbird hopping along the ground.
“The tea is ready for the gentlemen when they arrive,” she told Edward eagerly. George hadn’t expected her to care about the visiting professors.
A knock at the front door, though genteel, carried over the now-crackling hearth.
The parlour door opened to reveal the two men, garbed in traditional physician black. A rush of wind from the street sent flames jumping into the chimney.
William Cullen, professor of the practice of physic, who strode in with a welcoming beam, was the older and stockier of the two, with a genial, expressive countenance. He wore an oversized horsehair wig in a style several decades out of fashion. Cullen’s greetings towards those he knew seemed derived from genuine delight and affection the recipient could not help but match.
Following just a step behind, like a cool draught on a humid summer afternoon, was Joseph Black, professor of chemistry. Where Cullen was stocky and lively, Black was tall, thin and graceful. Where Cullen’s complexion was hearty, Black’s was pale as milk. Although delicate, he looked younger than his fifty years, powdering his mostly brown hair in a more modern, understated style. Black’s eyes moved with simple economy of movement around the room as he greeted those he recognised with a short but respectful nod. Despite his unnatural stillness and quiet, George found himself glancing at Black time and time again. What was he thinking? Was he displeased or indifferent by the company?
Cups of piping-hot tea were passed around, and the lodgers settled into an awkward circle as the visiting professors—now seated—moved through the appropriate social motions.
This stilted scene reminded George of the feral puppies he encountered as a child at his aunt’s farmhouse. A stray bitch that roamed the nearby woodland gave birth to a litter one summer, hidden away from humans in a makeshift den. When the puppies were older, George and his cousins tracked them down, bringing scraps of cold meats to the den every evening. The puppies flinched and cowered with every movement the boys made, backing two steps into the undergrowth, then edging forward towards the scraps tossed their way, bobbing their heads as far away from their tensed bodies as possible. The puppies were simultaneously enthralled and terrified by George and his cousins, and the nervous energy of the medical students in the presence of their professors reminded him of them.
Not that I’m any braver than the other students, he thought ruefully. He’d been in Edinburgh scarcely a few weeks, and this was the first time encountering Cullen and Black outside the college grounds. He’d had about as much exposure to medical faculty before now as those feral puppies had to humans. He turned his head away to recompose his expression.
“Your background is very interesting, Mr Stephens.”
The voice made George start, for it sounded like someone had spoken into his ear. He turned. From his seated position several metres away, Black watched him with a look of mild amusement. The kindling let out a few satisfied crackles.
“It occurred to me that your background is very interesting, Mr Stephens,” Black repeated, leaning forward with what George believed a genuine smile. “Your military conduct in New York was superb, so my sources tell me. I hear you are already adept in many fields of learning, and a keen study.” Without strain, his low voice carried across the room. Black spoke in a melodious tone, with an accent that shifted as the listener concentrated: the product of a youth transposed between France, Ireland and Scotland.
“Thank you, sir,” George responded. This sudden attention was daunting, but he knew he should keep the conversation going, though he worried any remark he made would sound foolish. Wetting his lips, George ventured, “I understand Mr Pearson was a former student of yours?”
Black nodded.
“The very same. A delightful correspondent; he speaks highly of you.”
“Neil’s still an army surgeon?” Cullen asked. “When I spoke to him several years ago, he wanted to set up a school in London.”
George was sure Cullen had directed the question at Black, but Black held George in his gaze. A slight nod gave George permission to answer.
“I got the impression Mr Pearson likes army life more than he expected,” George hazarded. He could have added that Mr Pearson was often disparaging of the medical school community and what he called its insular, conservative nature—but that seemed improper to mention in polite conversation. It was why Pearson never studied beyond the minimum necessary to qualify as a surgeon.
Another nod from Black as George struggled to add something intelligent to his reply. “That is the sentiment I gathered from reading his letters.”
Cullen made complimentary remarks about Mr Pearson before moving the conversation back across the room. The lodgers were relaxing, curiosity triumphing over caution. George leant back in his chair and let others carry the discourse. A short but positive interaction with two giants of medical science wasn’t a bad start, and he dared not contribute more, for fear of ruining his success. Black didn’t say much else, though George noticed that when the other lodgers turned their heads away he would sometimes study them with a thoughtful expression.
A few tolerable hours passed, and the professors readied to leave. George rose to bid them farewell. As Black stood in the doorway George noticed he’d left his walking cane leaning against the chair, so he picked it up and handed it over. As he did so he was momentarily confused—Black’s slender cane was heavier than it looked.
“I’m glad to meet you, Mr Stephens,” Cullen said, grasping his hand. “I’m excited to see where your medical studies take you—your abilities are certainly promising.”
“Indeed, sir.” George cursed himself for agreeing so readily with this assessment. “I know Mr Pearson finds great fulfilment in his work. I owe much credit to him for setting me on this path, but I suspect my medical studies won’t take me back to the battlefields.”
“No,” said Black, with more of a smile than George had seen all afternoon. “I don’t imagine they will.”
* * *
The encounter weighed on George’s mind in the days that followed. As he went to lectures and ran errands around the town, he spotted Black and Cullen from afar on several occasions. Sometimes together, sometimes drawn in carriages alone. He never got close enough for a greeting or acknowledgement, though he suspected both men recognised him as surely as he did them.
Black’s remarks were the first time anyone in the medical school had said something complimentary about his background.
George remembered the reverence for former soldiers gathered in the dusty taverns around his hamlet, how willing the other tavern-dwellers were to listen to their exploits and saucy tales. He wasn’t proud to admit it, but sometimes as he lay awake in his tent he wished he’d depart New York with a gruesome injury, because those ex-soldiers commanded the most attention.
As it transpired, he came home intact, but his interest in martial glory was severed. The British Army was subject to the same incompetent leadership that dogged every honourable profession, and George resented the snakes among his ranks who ingratiated themselves to gain promotion.
Neil Pearson had sensed George’s disillusion with the army and urged him to consider a medical education whenever George took to loitering around the field hospital.
“You have the head of a physician,” he told George. “I can recommend you to the faculty at Edinburgh.”
George had no reason to doubt the advice of the army surgeon he so admired.
* * *
A rude banging at his door disrupted George’s belated attempt at composing a letter home.
“Yes?” George asked, feigning politeness.
His fellow lodger James shoved the door open. Noticing the boy’s sour expression, George prepared himself for an argument. James was several years younger than him, with hair that couldn’t be bothered deciding if it was blond or brown and a childlike dearth of lived experience. He was the type of wealthy boy who could afford to be coddled by his parents, and for whom life as a medical student in Edinburgh would be his first time navigating the world alone. When animated, he brought George to mind of a screaming American possum.
Mrs Collins’ lodgings was the third boarding-house James had occupied this term. According to him, the first place was “too dirty”; the second landlady made what he considered unreasonable demands regarding use of her kitchen; and here James had already quarrelled with George and other lodgers over the kind of minor, almost non-existent slights he was yet to realise were a fact of life.
“A messenger delivered these for you, from Dr Cullen.”
So the handful of books James clutched were for him. George moved to stand, but James dropped the books on his bed and slammed the door shut. A folded note slid off the stack. James hadn’t appeared too curious about the delivery, but George knew he’d probably inspected the contents as thoroughly as he could while ascending the stairs and deemed them of no interest.
George unfolded the note.
Drs Black and Cullen humbly request Mr George Stephens’ company for dinner tomorrow night at Dr Black’s, 5 o’clock. Have you the time, you may find the following reading useful. Respectfully, your humble and obedient servant, WC.
Turning his attention to the books, George saw they included translations of scientific treatises by Georg Ernst Stahl and Cullen’s own work, First Lines of the Practice of Physic.
An invitation to dinner wasn’t unusual in itself. The medical faculty hosted many students, even those not yet enrolled in their classes. George wasn’t even the first of his cohort to receive such an invitation. However, although these evenings often turned to discussions of medical and educational matters, George wasn’t aware of any friends receiving reading material in advance of a dinner.
Instead of soaring with triumph, George was crushed under anxiety. No one noticed if he was lost in class: at the professor’s dinner table no one could miss it. Reluctantly, he pushed his incomplete letter aside.
The hours ticked towards evening, but first came George’s college classes. Dr Alexander Monro’s anatomy theatre was located down a winding staircase in the college basement. Thin windows near the ceiling were so meagre with illumination that Monro usually boarded them up and resorted to candles.
As George entered, Monro was in the centre of the room, bent over the dissecting table. A body lay concealed under a black sheet, though in the dim lights its outline didn’t bear much resemblance to a human. Spreading out from the central table were circular platforms for students to stand on and peer over the dissecting table, and raised tiered seating at the back of the room for everyone else. Beeswax candles were set around the table and along the first row of seating.
George was often the first student to arrive to Monro’s one o’clock lectures, given most students came direct from clinical rounds at the Infirmary. Seating in the old anatomy theatre was a careful art: sit on a high row at the back and you may experience a blessed breeze through the boarded window, carrying away the stench of decomposing matter. Sit or stand nearer the front and you’d have enough light to see what was going on.
The dais creaked as he crossed it. Monro looked up. He was the kind of oversized, naturally humourless figure who always performed a poor impression of joviality, as if unsure what true happiness looked like. “Ah, it’s Mr Stevenson, isn’t it?”
“Stephens, but yes, sir.”
“Of course! Forgive me, Mr Stephens. I’m terrible with names.”
This was after multiple conversations at the start of term, and Dr Monro agreeing to waive George’s course fee on account of his reduced means.
From this angle, George saw Monro was preparing a pig’s body for dissection. He could hear a knife snipping through gristle.
“There’s talk of that murderer from Prestonpans hanging soon, but no definitive date as far as I can tell. Anyway, this early in the term we’d be wasting the body on students still in the habit of vomiting and swooning when they see a corpse. A pig or dog illustrates the anatomical principles well enough for now.” Monro eyed George, his fleshy face concealed in shadow. “I imagine with your military adventures we won’t have to worry about you taking ill?”
“It’s unlikely, sir,” George admitted. A skeleton hung from the ceiling beams, left twisting idly by footfalls in the old wing above. Behind Monro, he could make out a web of blood vessels displayed by the door, preserved in red wax. Next to it were several jars containing pale and delicate fronds of human tissue; George couldn’t decide what they were.
It was true he’d seen the dead and dying, but none of the deceased things in here bore much resemblance to humans.
“How are you finding the lecture material?” Monro asked. “I don’t hear much from you during class. Or after.” His reproach was undeniable.
George had assumed his professor would be annoyed by his questions, some of which he feared laughable, and would not want to deal with another lost soul after his lecturing duty ended. He bit his lip.
“You know, of course, that there is still space in the evening demonstration course,” Monro continued, turning his attention back to the carcass. “Run at the College of Surgeons by my colleague Mr Fyfe. He’s a tolerable lecturer, if I say so myself—huh-huh—and the students who attend find his smaller class size conducive to deepened understanding of anatomy.”
Which is another thing that costs money, George thought. Another guinea that I don’t possess. His family saved what they could, but hadn’t appreciated that every step of his medical education involved separating coin from purse: course fees, books, evening remedial lectures, private tutors. Seeing how they struggled after parting with the funds that covered his boarding, George couldn’t bring himself to ask for more.
Asking his fellow students for assistance yielded mixed results. All but one of them acted like George wasn’t there, and he didn’t like dwelling on the anomaly.
“I tell my students I don’t expect them to know everything on the first day of class,” Monro went on. “Or else they wouldn’t need to be here. Nor do I expect them to agree with me on every theoretical point. If you scrutinise Professor Cullen’s theories”—here George’s heart rate spiked—“you’ll see our thinking diverges considerably on matters relating to the nervous system. But this kind of healthy disagreement among academics is important to advance the field towards true understanding of the human condition.”
Monro spoke in such a flat tone, preoccupied with snipping through tendons, that George couldn’t tell if he was sincere. Nothing the anatomy professor had said in class so far implied friendship with Cullen. Had Monro become aware of his dinner invitation? Was he delivering some kind of warning?
A soft chirbling noise from across the room startled him.
A small child, no older than five, was perched on the front row of seats. George hadn’t noticed it was there. The child was waving its fingers in front of its face and making little noises to amuse itself.
“That’s my oldest, Alex,” Monro said, with a careless wave of his hand. “He’s a bit young, but I reckoned getting him used to the smells and sights in here now would only help him later. I must have been the same age when my father first brought me to watch his dissections. I was eighteen when I started assisting him in the demonstration of anatomy; I don’t know if I told you that.”
“No, sir.”
George had heard some of the older faculty refer to Monro with the epithet “junior”, since he shared the name Alexander with his father.
“He usually settles when I get to speaking,” Monro continued, still observing his son. “If not, I think I’ve got some kidney stones he can play with.” Another set of creaks broke his attention. “Well, look—if it isn’t Misters Sinclair and Campbell. Good of you to join us, boys!”
When George arrived to dinner at Black’s that evening, the two professors were conferring in the elegant dining room. The teal wallpaper with its intricate floral patterns was the most vibrant internal decor George had ever seen.
Black rose and walked over, with more liveliness than he displayed in public.
“A pleasure to see you again, Mr Stephens.”
“I appreciate your invitation, sir.” George wasn’t used to being in houses with dining rooms.
Cullen waved from across the room. “I trust a studious scholar such as yourself will have found the time to read all those books?”
“Correct. I was familiar with your work, of course, and knew a little of Stahl’s theories before settling down to read his essays.”
Black motioned George to join him at the table. His dark mahogany furniture gleamed in the fading evening light. George noticed the furthest end of Black’s dining room was occupied by a large cabinet filled with what appeared to be rock specimens. Aside from that, there was no other indication he was in the house of a natural philosopher. Dinner consisted of a respectable green pea soup, roasted sturgeon, mutton pie and apple dumplings. The conversation wound through trivial, light-hearted topics as they began to eat, though George sensed both men, but Cullen in particular, wanted to get to the real reason for their invitation as soon as it was polite to do so.
When he decided that point was reached, Black leant forward. He’d given George enough time to relax into the surroundings, but not so long his imagination carried him away debating the possible nature of his visit.
“How familiar are you with the theories of John Brown?” Black asked.
George looked at both men. Neither Cullen nor Black gave indication as to how they hoped he’d respond.
“I heard his medical theories are considered…radical,” George admitted. “But I know little of their nature.”
“His extramural lectures are very popular with students,” Cullen pressed. “Have you considered attending them?”
George’s heart began to accelerate. The professors were shepherding him towards a potential trap, that was clear, but he didn’t know what the trap was.
George knew a little of Brown. James, the querulous fellow, spoke glowingly of Brown’s private lecture courses and of the man himself. Brown had reputedly been so close to Cullen he’d named his infant son William Cullen Brown in honour of his former teacher. Rumours suggested the two men had fallen out, that Brown was recently denied a faculty position, despite a long career lecturing outwit the university. For all George knew, the two men were now reconciled, though if so it was strange the professors were querying him about Brown.
Whatever the answer Black and Cullen were looking for, George realised he couldn’t guess it. He also suspected Black had a keen sense for lies.
“I certainly considered attending Dr Brown’s lectures,” George admitted. “For the reason Dr Cullen stated. But then I decided against overtaxing my schedule.” He also worried that if James was a typical adherent of Brown’s, he’d struggle to enjoy their company. His consideration period was shortened by the knowledge Brown charged three guineas, like the university professors.
“Do not feel ashamed, Mr Stephens!” Cullen laughed. “Youths and their natural curiosity bring so much into the world.”
George allowed himself to believe he’d answered the professor’s question satisfactorily. The meal almost concluded, Black offered him a glass of wine.
“What do you know of phlogiston, Mr Stephens?” Black then asked.
This was at least a clearly defined trap, George noted, because the books Cullen had sent pertained to this topic.
“It is the element of fire,” George replied. “The driver of combustion and calcination, in the words of Stahl. Burning is the release of phlogiston from metal, wood or a match. Once burned, a metal can be returned to its pure state by reacting it with a phlogiston-rich substance, which replenishes the metal’s deficiency.” He knew he was giving the professors a simplistic answer, but they appeared satisfied with the information he had obtained from a few hours’ study. After a pause, he added, “Stahl hypothesised phlogiston could be harnessed for uses beyond these simple chemical transformations, but he didn’t elucidate further.”
“Yes, it’s a wonder, isn’t it?” Cullen mused, slipping into the tone of the lecture halls. “Phlogiston exists in all matter, living and inanimate, and simple experiments show it can be transmitted from one substance to another. We see what destructive and restorative power it is capable of. But maybe you can think of some uses for phlogiston?”
“Phlogiston exists within man, as well as nature?” George asked after an uncomfortable pause. He knew Cullen loved to draw students through this type of Socratic dialogue to the truth, but he had no idea where he was stepping.
“Indeed. Knowing that, now what do you think?”
“Well, I’d assume man has the power to generate fire, though losing phlogiston would surely come at a terrible cost to his body.” George thought of wood in the hearth turned to blackened, crumbling charcoal.
“A wise assumption. But man is more complex than a lump of metal?”
George had been wondering how the evening’s lines of questioning were linked, but now he thought he knew. From James’ rants on the subject, he was aware that a key point of theoretical contention between Brown and Cullen was their understanding of the nervous system. “Well, Dr Cullen, you yourself write extensively of man’s nervous system and its capacity for excitement and depression, which in the healthy individual can regulate itself but otherwise requires the attention of doctors.” He paused. “You think the innate balance of man’s nervous system can protect him from a sudden loss of phlogiston?”
The two professors were looking at each other. Cullen’s hand was resting on his chin, but now he leant an elbow on the table and lightly clenched his fist in front of George’s plate.
“After a fashion,” he said with a chuckle.
Cullen’s fingers began to glow.