N arriving home, I found awaiting me a letter from Dr. Thorndyke suggesting—in response to a general invitation that I had given him some time previously—that he should come down on Saturday to spend the week-end with me. Of course, I adopted the suggestion with very great pleasure, not a little flattered at receiving so distinguished a guest; and now I was somewhat disposed to regret my engagement to attend Mr. Japp's demonstration. However, as Thorndyke was not due until lunch time, I should have an opportunity of modifying my arrangement, if necessary.
But, as events turned out, I congratulated myself warmly on not having missed the morning visit to the Cathedral. It was a really remarkable experience; and not the least interesting part of it to me was the revelation of the inner personality of my friend, Mr. Japp. That usually dry and taciturn man of business was transfigured in the presence of the things that he really loved. He glowed with enthusiasm; he exhaled the very spirit of mediæval romance; at every pore he exuded strange and recondite knowledge. Obedient to his behest, the ancient building told the vivid story of its venerable past, presented itself in its rude and simple beginnings; exhibited the transformations that had marked the passing centuries; peopled itself with the illustrious departed, whose heirs we were and whose resting-places we looked upon; and became to us a living thing whose birth and growth we could watch, whose vicissitudes and changing conditions we could trace until they brought us to its august old age. Under his guidance we looked down the long vista of the past, from the time when simple masons scalloped the Norman capitals within, while illustrious craftsmen fashioned the wonderful west doorway, to that last upheaval that swept away the modern shoddy and restored to the old fabric its modest comeliness.
Architectural antiquities, however, are not the especial concern of this history, though they were not without a certain influence in its unfolding. Accordingly, I shall not follow our progress—attended by the indispensable photographic recording angel—through nave and aisles, form choir to transepts, and from tower to undercroft. At the close of a delightful morning I betook myself homeward, charged with new and varied knowledge, and with a cordial invitation to my guest to join the afternoon's expedition if he were archæologically inclined.
Apparently he was, for when, shortly after his arrival, I conveyed the invitation to him he accepted at once.
"I always take the opportunity," said he, "of getting what is practically first-hand information. Your friend, Mr. Japp, is evidently an enthusiast; he has expert technical knowledge, and he has apparently filled in his detail by personal investigation. A man like that can tell you more in an hour than guide-books could tell you in a lifetime. We had better get a large-scale map of the town to enable us to follow the description, unless you have one."
"I haven't," said I, "but we can get one on the way to the rendezvous. You got my report, I suppose?"
"Yes," he replied, "I got it yesterday. That, in fact, was what determined me to come down. The discovery of that bag upon the shore dispels to some extent the ambiguity of our data. The finding of the brooch did not enlighten us much. It might simply have been dropped and picked up by some casual wayfarer. In fact, that is what the appearances suggested, for it is manifestly improbable that a person who had committed a crime would take the risk of pawning the product of robbery with violence in the very neighbourhood where the crime had been committed, and after an interval of time which would allow of the hue and cry having already been raised. Your sergeant is probably right in assuming that the man with the mole had nothing to do with the affair. But the finding of this bag is a different matter. It connects that disappearance with the river and it offers a strong suggestion of crime."
"Don't you think it possible that she might have fallen into the river accidentally?" I asked.
"It is possible," he admitted. "But that is where the significance of the brooch comes in. If she had fallen into the river from some wharf or pier, there does not seem to be any reason why the brooch should have become detached and fallen on land—as it apparently did. The finding of the bag where it had been thrown up by the river, and of the brooch on shore, suggests a struggle on land previous to the fall into the water. You don't happen, I suppose, to know what the bag contained?"