"I am perfectly aware that he was murdered by your friend, Mr. Merrill," he said.

"I suggest," said Saul Arthur Mann calmly, "that you know the murderer, and you know the murderer was not Frank Merrill."

Jasper made no reply, and a faint smile flickered for a second at the corner of his mouth, but he gave no other sign of his inward feelings.

"And the other point you wish to raise?" he asked.

"The other is a more delicate subject, since it involves a lady," said the little man. "You are about to be married to Miss Nuttall."

Jasper Cole nodded.

"You have obtained an extraordinary influence over the lady in this past few months."

"I hope so," said the other cheerfully.

"It is an influence which might have been brought about by normal methods, but it is also one," Saul Arthur leaned over and tapped the table emphatically with each word, "which might be secured by a very clever chemist who had found a way of sapping the will of his victim."