"My own impression," said Viner, after a significant silence, "is that
we have just heard the plain truth! I'm going to work on it, anyway."

"In that case, Mr. Viner, there's no need for me to say anything,"
remarked Drillford. "It may be the plain truth. But as I am what I am,
all I know is the first-hand evidence against this young fellow. So he
really was a schoolmate of yours?"

"Certainly!" said Viner. "His people live, or did live, in the north. I
shall have to get into communication with them. But now--what about the
information he gave you? This man he saw?"

Drillford shook his head.

"Mr. Viner," he answered, "you don't understand police methods. We've got
very strong evidence against Hyde. We know nothing about a tall man in a
white muffler. If you want to clear Hyde, you'd better do what he
suggested--find that man! I wish you may--if he ever existed!"

"You don't believe Hyde?" asked Viner.

"I'm not required to believe anything, sir, unless I've good proof of
it," said Drillford with a significant smile. "If there is any mystery in
this murder, well--let's hope something will clear it up."

Viner went away troubled and thoughtful. He remembered Hyde well enough
now, though so many years had elapsed since their last meeting. And he
was genuinely convinced of his innocence: there had been a ring of truth
in all that he had said. Who, then, was the guilty man? And had robbery