"And what did the local directory say about Israel Kensky?" he asked innocently.
"Israel Kensky?" said the puzzled youth. "I don't remember that name."
"It is the only name worth remembering," said the other dryly, "and, by the way, you'll be able to study him in a strange environment, for he is in London at this moment."
A clerk had answered the bell and stood waiting in the doorway.
"Get Mr. Hay those books and pamphlets I spoke to you about," said Tremayne. "And, by the way, when did M. Kensky arrive?"
"To-day," said the clerk.
Tremayne nodded.
"In fact," he said, "London this week will be filled with people whose names are not in your precious directory, and all of whom you should know. The Yaroslavs are paying a sort of state visit."
"The Yaroslavs?" repeated Hay. "Oh, of course——"