Chapter 37

The Weight of What I Know

I left Blackwood House at half past eleven, after the ladies had been escorted to their carriages and the gentlemen had shaken hands and exchanged the conventional pleasantries that mark the conclusion of a formal evening, and I walked down the front steps and into the Mayfair night, and the night received me with the particular quality of warmth and stillness that belongs to London in late May, when the city has not yet settled into the oppressive heat of summer but has shed the damp chill of spring, and the air is soft and carries the mingled scents of horse chestnut blossom and coal smoke and the residue of expensive perfume that lingers in the wake of departing guests.

I walked. I did not take a cab, because the motion of a cab was enclosed and constrained, and I needed the openness of the street, the unobstructed forward movement of walking, the sense that I was going somewhere even if I did not know where.

My boots struck the pavement with a regularity that was almost hypnotic, heel and toe, heel and toe, and the rhythm of my footsteps provided a structure for the chaos of my thoughts, a metronomic framework within which the tumbling, colliding fragments of the evening's events could arrange themselves, if not into coherence, then at least into a sequence that I could examine, one fragment at a time, without being overwhelmed by the totality of what I knew.

The streets were quiet. Mayfair at half past eleven on a Friday evening in late May was a place of diminished activity, the carriages gone, the gaslights burning low, the houses dark behind their curtains, and I walked through the quiet with the particular alertness of a man who has spent his professional life moving through London at hours when most men are asleep and who has learned, through long experience, that the quiet streets are not necessarily safe streets and that the darkness conceals as much as it reveals.

But my alertness was mechanical, the reflexive vigilance of a trained detective, and my mind was elsewhere, in the dining room of Blackwood House, watching Cecilia walk through the door after her private meeting with Sir Geoffrey, and seeing, in the fraction of a second before the mask reassembled itself, the expression that had been beneath it.

I had seen that expression before. Not on Cecilia's face, or not exactly on her face, because the expressions I had seen on her face in the past had been variants of the performance — the warm smile, the measured glance, the calculated vulnerability — and the expression I had seen tonight was something else entirely.

It was an expression I had seen in the dock at the Old Bailey, on the faces of men who were calculating, in real time, the odds of their own survival.

It was an expression I had seen in the interrogation rooms at Scotland Yard, on the faces of suspects who were running through their options with the cold, rapid efficiency of minds that were accustomed to solving problems, and who were discovering, in the same instant, that the problem before them had no solution.

It was an expression of pure, undecorated cognition, the face of a mind that was operating without the mediation of emotion or social performance, and the effect of seeing it on Cecilia's face, in the context of a dinner party, surrounded by flowers and candles and the murmured noise of polite society, was like seeing a wolf's teeth behind a smile.

She had been calculating. I did not know what she had been calculating, but I knew, with the certainty that comes from months of studying her every gesture and expression and inflection, that she had been calculating.

The meeting with Sir Geoffrey had presented her with a threat, and Cecilia's response to threats was always the same: she calculated.

She assessed options. She weighed outcomes.

She ran scenarios. And she did all of this with a speed and a precision that I had never encountered in another human being, a speed and a precision that were, in their own way, as beautiful and as terrifying as everything else about her.

I turned into Green Park and walked along the gravel path that runs parallel to Constitution Hill, and the park was empty at this hour, the grass silver in the moonlight, the trees casting long shadows across the paths, and the air was cleaner here than in the streets, carrying the scent of grass and earth and the distant, salt-tinged freshness of the river.

I found a bench near the lake and sat down, and the bench was cold through my trousers, and the cold was grounding, a physical sensation that anchored me in the present moment and prevented the memories and the calculations from spinning entirely out of control.

I knew the truth. I had known it for months, with a certainty that had grown, over time, from suspicion to conviction to the kind of unshakeable knowledge that does not require further evidence because it has passed the point at which evidence is relevant.

Cecilia Blackwood had killed three men. She had killed Arthur Pendleton with a cardiac stimulant administered in his nightly cordial.

She had killed Henry Ravenscroft with a wire strung across a bridle path.

She had killed Richard Ashworth with arsenic dissolved in his brandy.

She had killed Sir William Hartwell, staged as a suicide, to prevent him from providing testimony that would have exposed the pattern.

She had done all of this with a meticulousness that was, in its own terrible way, a form of artistry, and she had done it without remorse, without guilt, without the slightest flicker of the moral awareness that would, in a normal person, have made the acts impossible to contemplate, let alone execute.

I knew this. I had assembled the evidence piece by piece, following trails that no one else had followed, asking questions that no one else had asked, persisting in an investigation that my superiors had told me to abandon and my colleagues had told me was obsessive.

The pattern was there. The methods were identifiable.

The motive was clear. Three marriages, three deaths, three inheritances, and one widow who was now wealthier and more socially elevated than any of her husbands had ever been.

The case was, by any reasonable standard, solved.

The truth was known. And the truth, once known, demanded action, because the purpose of knowing the truth was to act upon it, to bring the perpetrator to justice, to ensure that the crimes were punished and the guilty were held accountable and the rule of law was upheld.

This was what I believed. This was what I had always believed.

It was the foundation of my career, the principle that had driven me through eleven years of detective work, the conviction that had sustained me through the long hours and the dead ends and the cases that were solved and the cases that were not.

The truth demanded action, and the action was arrest, and the arrest was prosecution, and the prosecution was conviction, and the conviction was imprisonment, and the imprisonment was justice.

And I did not want it.

The realisation arrived with the force of a physical blow, a sudden, sickening impact that drove the breath from my lungs and left me sitting on the cold bench in Green Park with my hands gripping the slats of wood on either side of my thighs and my eyes staring at the silver surface of the lake and the knowledge, which was now absolute and irrevocable and which sat in my chest like a stone, that I did not want Cecilia Blackwood to be caught.

I did not want her to be caught.

The thought was so monstrous, so utterly at odds with everything I believed about myself and my profession and my purpose in the world, that I tried, for several seconds, to deny it.

I told myself that I wanted justice. I told myself that I wanted the rule of law to prevail.

I told myself that three men were dead and a fourth man was dead and that the woman who had killed them was sitting in a house in Mayfair surrounded by flowers and silver and the accumulated wealth of her crimes, and that the knowledge of her guilt, once established, carried with it an obligation to act, an obligation that was not optional but binding, an obligation that was the very essence of what it meant to be a detective and a servant of the law.

I told myself all of these things, and the telling was sincere, and the sincerity was irrelevant, because beneath the sincerity, in the deeper, darker, more honest part of my mind where the real calculations were performed, the calculation had already been completed, and the result of the calculation was this: I did not want her to be caught.

I sat on the bench and felt the weight of what I knew, and the weight was not the weight of evidence or the weight of moral obligation or the weight of professional duty.

The weight was the weight of desire, which was heavier than all of those things combined, and which pressed against my chest with a force that was almost physical, as though an invisible hand had reached inside me and was squeezing the organ that pumped blood and feeling and the terrible, contradictory knowledge that the woman I desired was a murderer, and that my desire for her was inseparable from my knowledge of what she was, and that the two things — the desire and the knowledge — had become so thoroughly entangled in my mind that I could no longer distinguish between them or determine where one ended and the other began.

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