“Shall I have a try, Sir?” the superintendent suggested, patiently, adding with a smile, “I don’t smoke quite so many cigarettes as you seem to.”

His efforts, however, also failed, for the evident reason that it was the wrong key. Thereupon he looked quickly through the bunch, picked out another key and had the cupboard open in a twinkling, revealing a set of shelves crammed with a disorderly litter of cardboard boxes, empty ink-bottles, bundles of letters and papers and the miscellaneous rubbish that accumulates in the receptacles of a thoroughly untidy man. The superintendent went through the collection methodically, emptying the shelves, one at a time, on to the flap of the bureau, where he and the sergeant sorted the various articles and examining each, returned it to the shelf. It was a tedious proceeding and, so far as I could judge, unproductive, for, when all the shelves had been looked through and every article separately inspected, nothing was brought to light save an empty foolscap envelope which had apparently once contained a small box and was addressed to Wallingford, and two pieces of what looked like chemist’s wrapping-paper, the creases in which showed that they had been small packets. These were not returned to the shelves, but, without comment, enclosed in a large envelope on which the superintendent scribbled a few words with a pencil and which was then consigned to a large handbag that the sergeant had brought in with him from the hall.

The large drawers of the bureau were next examined. Like the shelves, they were filled with a horrible accumulation of odds and ends which had evidently been stuffed into them to get them out of the way. From this collection nothing was obtained which interested the officers, who next turned their attention to the small drawers and pigeonholes at the back of the flap. These, however, contained nothing but stationery and a number of letters, bills and other papers, which the two officers glanced through and replaced. When all the small drawers and pigeonholes had been examined, the superintendent stood up, fixing a thoughtful glance at the middle of the range of drawers; and I waited expectantly for the next development. Like many old bureaus, this one had as a central feature a nest of four very small drawers enclosed by a door. I knew the arrangement very well, and so, apparently, did the superintendent; for, once more opening the top drawer, he pulled it right out and laid it on the writing flap. Then, producing from his pocket a folding foot-rule, he thrust it into one of the pigeonholes, showing a depth of eight and a half inches, and then into the case of the little drawer, which proved to be only a fraction over five inches deep.

“There is something more here than meets the eye,” he remarked pleasantly. “Do you know what is at the back of those drawers, Mr. Wallingford?”

The unfortunate secretary, who had been watching the officer’s proceedings with a look of consternation, did not reply for a few moments, but remained staring wildly at the aperture from which the drawer had been taken out.

“At the back?” he stammered, at length. “No, I can’t say that I do. It isn’t my bureau, you know. I only had the use of it.”

“I see,” said Miller. “Well, I expect we can soon find out.”

He drew out a second drawer and, grasping the partition between the two, gave a gentle pull, when the whole nest slid easily forward and came right out of its case. Miller laid it on the writing flap, and, turning it round, displayed a sliding lid at the back, which he drew up; when there came into view a set of four little drawers similar to those in front but furnished with leather tabs instead of handles. Miller drew out the top drawer and a sudden change in the expression on his face told me that he had lighted on something that seemed to him significant.

“Now I wonder what this is?” said he, taking from the drawer a small white-paper packet. “Feels like some sort of powder. You say you don’t know anything about it, Mr. Wallingford?”

Wallingford shook his head but made no further reply, whereupon the superintendent laid the packet on the flap and very carefully unfolded the ends—it had already been opened—when it was seen that the contents consisted of some two or three teaspoonfuls of a fine, white powder.