“I wanted Wilhelm to die. I wanted his money. In order to kill one, I needed to kill five — Harshaw’s enemies and the old man himself. I required assistance. I found it, through Fredericks.
“I was here alone, the day before Harshaw was to go away — at the false advice of Fredericks. I prepared everything.
“I loaded the clockwork apparatus with death letters. I put bullets in the gun behind the radiator — the gun which Harshaw had decided not to use.
“That was a clever idea, that radiator. I suggested it. Harshaw prepared it, working for himself, he thought. Actually, he was working for me.
“I knew that Harshaw, going on a trip, would put his own prepared letters in the chute. That meant that he had to open the radiator. He did so, after I had left. He died.”
Ending his statement of one death, Biscayne paused leisurely. Cardona seemed eager and attentive. The professor resumed his discourse, as though speaking in a classroom.
“I knew enough about Louis Glenn to plant those cigarettes in his pocket. I bought two packages of the same cigarettes months ago.
“One for Glenn’s pocket. The other, for Harshaw’s strong box. Fredericks poisoned the cigarette. Glenn died.
“Fredericks was useful with Thomas Sutton. Knowing that the old man changed physicians often, he called there, as though by a mistake. The ruse worked.
“Fredericks heard the old man talking about the gold-headed cane. The second time he was at the house, Fredericks noted the closet, while coming out alone.