"Neither," retorted the detective, calmly. "The man who purchased this was Oliver Whyte himself."
"Himself?" echoed Brian, now thoroughly surprised, as, indeed were all the others.
"Yes. I had no trouble in finding out that, thanks to the 'Poisons Act.' As I knew no one would be so foolish as to carry chloroform about in his pocket for any length of time, I mentioned the day of the murder as the probable date it was bought. The chemist turned up in his book, and found that Whyte was the purchaser."
"And what did he buy it for?" asked Chinston.
"That's more than I can tell you," said Kilsip, with a shrug of his shoulders. "It's down in the book as being bought for medicinal uses, which may mean anything."
"The law requires a witness," observed Calton, cautiously. "Who was the witness?"
Again Kilsip smiled triumphantly.
"I think I can guess," said Fitzgerald. "Moreland?"
Kilsip nodded.
"And I suppose," remarked Calton, in a slightly sarcastic tone, "that is another of your proofs against Moreland. He knew that Whyte had chloroform on him, therefore he followed him that night and murdered him?"