“I once studied to be a doctor. Such things naturally interest me.”
“Ah! So poisons ‘naturally interest’ you, do they? Still, you waited to be alone before gratifying that ‘interest’ of yours?”
“That was pure chance. If the others had been there, I should have done just the same.”
“Still, as it happens, the others were not there?”
“No, but——”
“In fact, during the whole afternoon, you were only alone for a couple of minutes, and it happened—I say, it happened—to be during those two minutes that you displayed your ‘natural interest’ in Hydro-chloride of Strychnine?”
Lawrence stammered pitiably.
“I—I——”
With a satisfied and expressive countenance, Sir Ernest observed:
“I have nothing more to ask you, Mr. Cavendish.”