Larose was quite calm and collected. All his professional instincts had been aroused and he was in no way over-awed by the stern tone of the great surgeon.
“I'll mince no words,” he said sharply. “I'm not sure of you.”
“Oh!” exclaimed Sir Arnold sarcastically. “That's unfortunate.”
“You were the last person to be with the child before he disappeared,” said Larose.
“Quite so!” agreed the surgeon. “I was the last.”
“Then I know you,” went on Larose, “to have been consorting with two members of the very gang who took part in that attack upon Lady Ardane when I was with her in her car.” He punctuated every word. “I saw you come out of that house upon the marsh where they were hiding. I was not ten yards away, between the hedge, and with my own ears, I heard you warn them to be on the look
