“Then let it be to-morrow night. I will withdraw the guard of commissionaires at the safe. I can easily justify myself afterwards.”

An idea struck Connor.

“Why not send another lot of men to relieve them? I can fix up some of the boys so that they’ll look like commissionaires.”

Spedding’s eyes narrowed.

“Yes,” he said slowly, “it could be arranged—an excellent idea.”

He paced the room with long, swinging strides, his forehead puckered.

“There are two reliefs,” he said, “one in the morning and one in the evening. I could send a note to the sergeant of the morning relief telling him that I had arranged for a new set of night men—I have changed them twice already, one cannot be too careful—and I could give you the necessary authority to take over charge.”

“Better still,” said Connor, “instruct him to withdraw, leaving the place empty, then our arrival will attract no notice. Lombard Street must be used to the commissionaires going on guard.”

“That is an idea,” said Spedding, and sat down to write the letter.