We lunched at our chambers on the following day, and, after the meal, drew up our chairs to the fire and lit our pipes. Thorndyke was evidently preoccupied, for he laid his open notebook on his knee, and, gazing meditatively into the fire, made occasional entries with his pencil as though he were arranging the points of an argument. Assuming that the Aldgate murder was the subject of his cogitations, I ventured to ask:

"Have you any material evidence to offer the coroner?"

He closed his notebook and put it away. "The evidence that I have," he said, "is material and important; but it is disjointed and rather inconclusive. If I can join it up into a coherent whole, as I hope to do before I reach the court, it will be very important indeed—but here is my invaluable familiar, with the instruments of research." He turned with a smile towards Polton, who had just entered the room, and master and man exchanged a friendly glance of mutual appreciation. The relations of Thorndyke and his assistant were a constant delight to me: on the one side, service, loyal and whole-hearted; on the other, frank and full recognition.

"I should think those will do, sir," said Polton, handing his principal a small cardboard box such as playing-cards are carried in. Thorndyke pulled off the lid, and I then saw that the box was fitted internally with grooves for plates, and contained two mounted photographs. The latter were very singular productions indeed; they were copies each of a page of the Testament, one Russian and the other Yiddish; but the lettering appeared white on a black ground, of which it occupied only quite a small space in the middle, leaving a broad black margin. Each photograph was mounted on a stiff card, and each card had a duplicate photograph pasted on the back.

Thorndyke exhibited them to me with a provoking smile, holding them daintily by their edges, before he slid them back into the grooves of their box.

"We are making a little digression into philology, you see," he remarked, as he pocketed the box. "But we must be off now, or we shall keep Davidson waiting. Thank you, Polton."

The District Railway carried us swiftly eastward, and we emerged from Aldgate Station a full half-hour before we were due. Nevertheless, Thorndyke stepped out briskly, but instead of making directly for the mortuary, he strayed off unaccountably into Mansell Street, scanning the numbers of the houses as he went. A row of old houses, picturesque but grimy, on our right seemed specially to attract him, and he slowed down as we approached them.

"There is a quaint survival, Jervis," he remarked, pointing to a crudely painted, wooden effigy of an Indian standing on a bracket at the door of a small old-fashioned tobacconist's shop. We halted to look at the little image, and at that moment the side door opened, and a woman came out on to the doorstop, where she stood gazing up and down the street.

Thorndyke immediately crossed the pavement, and addressed her, apparently with some question, for I heard her answer presently: "A quarter-past six is his time, sir, and he is generally punctual to the minute."

"Thank you," said Thorndyke; "I'll bear that in mind;" and, lifting his hat, he walked on briskly, turning presently up a side-street which brought us out into Aldgate. It was now but five minutes to four, so we strode off quickly to keep our tryst at the mortuary; but although we arrived at the gate as the hour was striking, when we entered the building we found Dr. Davidson hanging up his apron and preparing to depart.