"I never thought of that, only a letter from Old Danny to Merle might give us away."

"We can fix the old man," said the detective. "But Merle must have had great cause to wish that tracker out of the way."

"He has cause. That was a dangerous man."

"Was he an Englishman?"

"No. No Scotland Yarder would have made Merle so eager to get away from him. He was one of these Yankee sleuths. He followed Merle all the way from New York."

"What for?"

"Just exactly what for I can't tell. You see that is one of the secrets Merle never confided to me."

"You're not his confidant, then?"

"Not in all things. He keeps some secrets from Belle Demona even."

"When did you go to London, Jem?"