"Indeed, I am quite in earnest!" protested Torry. "Listen! I left the tracing of the numbers of the stolen notes to Grent's bank, but all these weeks the bank has failed to obtain information. I fear, therefore, that they have bungled the matter, and I wish to place it in more capable hands--yours, for instance."
"I fear I can do little, Torry!"
"A man with brains can do anything," retorted the detective. "See here, Mr. Darrel, this is a list of the numbers of the original notes which were stolen from the private safe; and here is another with the numbers of the restored notes. Now, you take these two lists, and go round to every bank in the United Kingdom until you find the changed notes. Then discover who changed them. If you are successful----"
"Well!" said Darrel, taking the lists, "if I am successful?"
"In that case," finished Torry, "the mystery, which has perplexed us so long, will be at an end."
"You mean, we shall catch the assassin?"
"Yes; the assassin who changed these notes."
"But, I say," said Darrel doubtfully, "you have yet to prove that Grent had the ten thousand pounds on him when he was murdered."
"I'll prove that when you find out who changed the notes."
"By forcing the assassin to confess?"