The Instrument of Deception

The toxicology results arrived on the eighteenth of November, three days after Professor Hale's death.Dr. Osei relayed them to Constable Briar in a conversation I was able to attend, because Constable Briar had, by this point, developed a habit of conducting his interviews in the Historical Society reading room, which he claimed was because it was quieter than the station and better heated. I suspect it was also because the Society has excellent tea and Agnes Quill, who provides it, has a gift for making people feel safe enough to say more than they intended.I remained in my cabinet. The Constable has made his peace with this.The toxicology showed elevated digitalis glycoside levels. Specifically, digoxin — a compound extracted from the foxglove plant, used in small quantities as a cardiac medication, fatal in large ones. Professor Hale had no prescription for digoxin. He had no cardiac condition on record.Dr. Osei said, with the measured evenness of someone delivering a verdict they have been quietly certain of for days: “He was poisoned.”Constable Briar said nothing for a moment. Then: “The tea mug.”“Most likely delivery method, yes.”The tea mug had been tested. It showed trace residue consistent with the compound.I ran the facts as they now stood: someone had introduced digoxin into Professor Hale's tea, in sufficient quantity to stop his heart. This had likely occurred during or shortly before 9:00 PM on the fourteenth — the time Agnes saw him arrive home. He had died within hours. His study had been locked from the inside, which meant he had locked it himself, either as habit or in distress, before losing consciousness at his desk.There was, still, the central problem.The study had been locked from the inside. There were no signs of another person's presence. The tea mug was inside the room. Which meant the poison had been delivered before Hale entered the study — in his body already when he arrived.I reviewed my records of the rehearsal.I had photographed the refreshment table at St. Crispin's Hall: a trestle table with a standard village-hall arrangement — an urn of hot water, a box of tea bags, a jar of instant coffee, a plate of biscuits, a small collection of personal mugs left by regular attendees. Professor Hale's mug was distinctive: dark green, with the Royal Academy crest.He had been drinking from it during the rehearsal. I had a photograph taken at 8:14 PM that showed the mug on the music stand beside him.Now I needed to know: who had access to that mug, and when?I reviewed the footage from my camera. I had been set up at the back of the hall, covering the full ensemble, which meant the refreshment table at stage left was in frame but not in focus. I ran enhancement algorithms and reconstructed a clearer image across twelve frames covering the interval between 8:00 PM and 8:45 PM — the rehearsal break.During this interval, eleven people were moving freely around the hall.At 8:23 PM, there was a figure near the refreshment table for approximately forty seconds. The image was not clear enough for facial identification. Height, build, and gait were consistent with at least three of the people present.But at 8:26 PM — two minutes after this figure moved away — Professor Hale returned to his mug.I had forty seconds of proximity. I had a poisoner.What I did not have, yet, was a name.I went back to the *WHAT WAS TAKEN* document.The paper in Tommy Finch's violin case: I now believed this was a letter from Professor Hale, which Finch had received at some point — likely delivered to the hall before the rehearsal, which would explain why he arrived so early. A letter he had not wanted others to see. A letter that, if Hale had written it recently, might explain why the filing cabinet had been opened and searched.The filing cabinet: Hale had kept letters there. I knew this from Agnes, who had helped him move into the study four years ago and had commented, in a Society meeting, on the number of “paper-organised” people in the village. The filing cabinet contained correspondence. Someone had searched it. Someone who wanted to remove or verify something.The envelope in the wastebin: discarded by Hale himself, or by the person who searched the cabinet? I could not yet determine this.But I could determine something else.Digoxin is extracted from *Digitalis purpurea*, the common foxglove. It is not a compound one purchases at a chemist. It requires knowledge of organic chemistry, access to plant material, and time. I searched the Historical Society's records for recent foxglove cultivation — we maintain records of the village allotment society — and found one registered grower: a plot on the south side of the allotment field, growing a cultivated variety of foxglove for ornamental purposes.The plot was registered in the name of Vivienne Hale.I sat with this for a long time.Vivienne, who had studied chemistry before music. I found this in a 2019 interview she had given to the Thornwick Messenger about her life before she came to the village.Vivienne, who had been present at the rehearsal. Who had access to the refreshment table. Whose gait, reviewing the footage again, I could not rule out among the three possibilities.Vivienne, who had told me that Edmund was “carrying something,” and that she could see it from where she was standing.How close were you standing, I thought, to know that?I composed a careful message to Constable Briar. I labelled it: *SIGNIFICANT FINDINGS — PLEASE CALL.*He called within four minutes, which was faster than usual.“Walk me through it,” he said.I did. I was thorough. At the end, he was quiet for long enough that I ran a check on the call connection to confirm it was still active.“She had access to the mug,” he said at last.“Several people did. But she is the only one with the botanical knowledge, the plant material, and — I believe — the specific correspondence to recover.”Another pause.“You think she searched the filing cabinet.”“I think she searched it before calling anyone. She has a key to the study — she mentioned the shared finances. She would have known about the loan guarantee. She may have known he had written about it.”“And Tommy Finch's letter?”“That,” I said, “I believe was written before the loan became critical. It is the piece of this I am least certain about.”Constable Briar said, quietly: “She was his wife.”“She is his wife,” I said, because technically this was still true. “And she was in the orchestra. She was in that hall every week, watching him conduct something she'd given up to be with him, and she saw him every week after the separation too, and she still planted foxgloves.”There was a very long pause.“SEREN,” he said. “Sometimes I think you understand people better than you let on.”“I understand patterns,” I said. “People are a subset of patterns.”He didn't reply to this. But I think he knew I was being less than fully honest.