“About that, sir.”

“Then I will walk; I shall not be likely to find anyone to hold my horse there.”

Mark had no difficulty in finding the house. It looked as if it had been untenanted for some time, and in the window was a notice that for keys and information applications were to be made at a shop in the High Street. Well pleased to find that there was no one in the house, Mark entered the gate and passed round into what at one time had been a kitchen garden behind it; at the bottom of this was a field of three or four acres.

The ground was separated by a hedge from that of the house beyond. This was fully a hundred yards away. A well bred horse was grazing in the field, a man smoking a pipe was watching a boy doing gardening work behind the house. Mark remained for nearly an hour concealed behind the hedge in hopes that he would come nearer. At the end of that time, however, he went into the house, and after waiting another ten minutes Mark also left, resisting the temptation to walk along the road and take a closer look at it, for he felt that such a step would be dangerous, for should the man notice anyone looking at the place his suspicions might be aroused.

It was evident that the lane was very little used; in many cases the grass grew across it. There were marks of horses' feet, but none of wheels, and he concluded that when going up to town the man came that way and rode quietly through Streatham, for the hoof prints all pointed in that direction, and that on his return at night he came up the lane from the other road.

“Well, master, what do you think of the houses?” the ostler asked on his return to the inn.

“I have only been to the one in the lane that you spoke of, for I want to get back to town. I had a good look at it, but it is rather a dreary looking place, and evidently wants a lot of repairs before it can be made comfortable. The next time that I am down I will look at the other.”

Mounting his horse, he rode at a rapid pace into London, and dismounted at Bow Street.

“You have news, I see, Mr. Thorndyke,” the chief said when he entered.

“I have, sir; I believe that I have marked the man down; at any rate, if it is not he, it is a criminal of some sort—of that I have no doubt.”