“That evening, Mr. Ludgrove took his usual walk, returning by way of Paddington station. From here he telephoned to Mr. Tovey, giving him the message that he was wanted at St. Martha’s. Mr. Ludgrove then walked back here, and took on the character of the Black Sailor. Behind this shop is a piece of ground which was once a garden, and that in turn is separated by a low wall from a yard, deserted after business hours, with gates and also a small door leading into a back street. I had made myself a key to the small door, and it provided me with an alternative means of access to this house.