"Who was the last to leave the premises on the evening of the ninth?"
"I am not sure."
"Why are you not sure?"
"I had to take a note and a parcel to a firm in Shoreditch. When I started, a clerk named Thomas Holker was in the outer office and Mr. Walter Hornby was in the private office. When I returned they had both gone."
"Was the outer door locked?"
"Yes."
"Had Holker a key of the outer door?"
"No. Mr. Hornby and his two nephews had each a key, and I have one. No one else had a key."
"How long were you absent?"
"About three-quarters of an hour."