The tradesman led the way into a small room partitioned off from the shop by a glass screen and on closing the door of this, he handed Darrel a chair with great politeness.
"I await your explanation, sir," he said, smoothing out the shirt on the table.
"One moment," said Frank quickly. "If I tell you my reason for asking this question, and you agree to answer it, can I rely on your being able to give me the desired information?"
"Assuredly, sir. You will observe that under these letters 'J.G.' there is a number, one thousand four hundred and twenty. Well, sir, we index, so to speak, all shirts of our manufacture in that way; and--should your reason for seeking information satisfy me--I have only to look up that number in our books to learn for whom this shirt was made."
"Then you had better do so at once, Mr. Harcot; for thereby you may be able to capture a criminal."
The tradesman looked amazed. "Capture a criminal?" he repeated.
"Yes. On Sunday morning last, after one o'clock, the man to whom that shirt belonged was murdered."
"Yes; stabbed to the heart in Mortality-lane."
"Dear, dear!" cried Mr. Harcot in much agitation. "You don't say so! I noticed an account of the tragedy in the _Star_--an early issue, Mr. Darrel, published at two o'clock; but I did not think that a customer of ours was the victim. How very dreadful! Who is the unfortunate gentleman?"
"That is what I wish you to tell me, Mr. Harcot."
"With pleasure, with pleasure; but if you will excuse my saying so, sir, I did not know that you were an officer of the law."
"Nor am I," rejoined Darrel drily. "I am a novelist; but the detective in charge of this case has permitted me to assist him."
"Oh, indeed, sir," replied Mr. Harcot, considerably astonished. "If you will permit me, sir, I will look up our books."
Washing his hands with invisible soap, and bowing politely, Mr. Harcot vanished, leaving Darrel to his own thoughts. In about ten minutes he returned, looking very pale and concerned. Frank was a trifle surprised at this agitation.
"Dear, dear!" gasped the man, sitting down with an air of consternation. "I am shocked, really. Such a respectable gentleman! so old a customer!"
"What is the name?" cried Darrel anxiously.