This problem occupied me for the rest of the day. My explanation did not seem quite to fit Thorndyke’s description of his methods; but I could think of no other. I turned it over during my solitary lunch; I meditated on it with the aid of several pipes in the afternoon; and having refreshed my brain with a cup of tea, I went forth to walk in the Temple gardens⁠—which I was permitted to do without breaking my parole⁠—to think it out afresh.

The result was disappointing. I was basing my reasoning on the assumption that the pieces of reed were parts of a particular appliance, appertaining to a particular craft; whereas they might be the remains of something quite different, appertaining to a totally different craft or to no craft at all. And in no case did they point to any known individual or indicate any but the vaguest kind of search. After pacing the pleasant walks for upwards of two hours, I at length turned back towards our chambers, where I arrived as the lamplighter was just finishing his round.