“Oh, perfectly. I quite understand, Mr. Wrench.”

“Very well. What I want you to do is this—​when he leaves, follow him and notice where he goes to. It’s probable he may make for the station; in which case push your inquiries no further, as you may rest assured that he is about to return to his own home.”

“But if he doesn’t do so?”

“If he does not, follow him and see where he goes to. This done, come to me.”

“And what’s he been up to—​forgery or something of that sort, I suppose?”

“Nothing of the kind. He has not done anything wrong—​at all events, nothing against the law.”

“What is he wanted for, then?”

“He is not wanted. All I require for the present of you is to ascertain where he goes to on the nights he does not return to Wood Green. We have good reason for believing that he has taken up with some woman. Should this be the case we must learn more about it.”

“Then that’s all you want me to do at present.”

“That is all. Here is the name and address of his governor. Now do your best. I have written underneath the address, between the hours of six and eight, and here is his photograph, by which you will be able to recognise him.”