Q. Did you use a poison in this syringe?
A. Yes, sir.
Q. What did you use?
M. LATOUR hesitated and shifted helplessly about as if he dreaded to go farther into these particulars, and fondly hoped someone might come to his rescue. His gaze seemed to shift about the room without in the least being able to disentangle itself from that of M. Godin. He remained silent and the question was repeated.
Q. What did you use?
Again the witness hesitated while everyone, save only Maitland and Godin, leaned eagerly forward to catch his reply. At length it came in a voice scarcely above a whisper.
A. Anhydrous hydrocyanic acid.
A long-drawn "Hum!" escaped from Maitland, while M. Godin gave not the slightest indication of surprise. It was quite evident to us all that the astute Frenchman had acquired complete control of the case before he had arrested the assassin. At this juncture the Court said, addressing Maitland: "This substance is extremely poisonous, I take it."
"Your Honour," Maitland replied, "it is the most fatal of all poisons known to chemists. It is also called cyanhydric, and, more commonly, prussic acid. An insignificant amount, when inhaled or brought into contact with the skin, causes immediate death. If a drop be placed upon the end of a glass rod and brought toward the nose of a live rabbit he will be dead before it reaches him."
A profound silence--the death-like quiet which accompanies an almost breaking tension--reigned in the court-room as Maitland turned again to Latour.
Q. I understand you to say you used anhydrous hydrocyanic or cyanhydric acid.
A. Yes, sir.
Q. Do you sufficiently understand chemistry to use these terms with accuracy? Might you not have used potassium cyanide or prussiate of potash?
A. I am a tolerably good chemist, and have spoken understandingly. Potassium cyanide, KCN, is a white, crystalline compound, and could hardly be used in a hypodermic syringe save in solution, in which condition it would not have been sufficiently poisonous to have served my purpose.
At this reply many of the audience exchanged approving glances. They believed M. Latour had shown himself quite a match for Maitland in not falling easily into what they regarded as a neat little trap which had been set to prove his lack of chemical knowledge. They attributed Maitland's failure to further interrogate Latour upon his understanding of chemistry as evidence that he had met an equal. To be sure, they were not quite clear in their own minds why Latour's counsel should be at such pains to carefully examine a man who had already confessed, but they believed they knew when a lawyer had met his match, and felt sure that this was one such instance. Clinton Browne, who sat in one of the front seats, seemed to find a deal more to amuse him in this incident than was apparent to me. Some men have such a wonderful sense of humour!