In all this, it may be said, I was appropriating to myself, without authority, a sort of watching brief on behalf of a purely chimerical client. I had no real justification for suspecting the Baron, either on his own account, or in association with my friend’s apparent state; it was presumptive that Sir Calvin knew at least as much about the man as I did; still, I thought, so long as I preserved my attitude of what I may call sympathetic vigilance à la sourdine, nothing could be lost, and something even might be gained. The common atmosphere, perhaps, affected me with the others, and inclined me to an unusually observant mood; a mood, it may be, prone to attach an over-importance to trifles. Thus, I could find food for it in an incident so ordinary as the following. There was a certain picture on the wall, a genre painting, to which Le Sage, sitting opposite it, referred in some connexion. Sir Calvin, replying, remarked that so-and-so had declared one of the figures to be out of proportion—too short or too tall, I forget which—and, in order to measure the discrepancy, interposed, after the manner of the connoisseur, a finger between his eye and the subject. There was nothing out of the common in the action, save only that the finger he raised was the second finger of his right hand, the first having been shot away in some long-past engagement; but it appeared, quite obviously to me, to arrest in a curious way the attention of the visitor. He forgot what he was saying at the moment, his speech tailed off, he sat gazing, as if suddenly fascinated, not at the picture but at the finger. The next instant he had caught up and continued what he was observing; but the minute incident left me wondering. It had signified, I was sure, no sudden realization of the disfigurement, since that must have been long known to him, but of some association with it accidentally suggested. That, in that single moment, was my very definite impression—I could hardly have explained why at the time; but there it was. And I may say now, in my own justification, that my instinct, or my intuition, was not at fault. Once or twice later I seemed to catch Le Sage manœuvring to procure a repetition of the action, but without full success; and soon afterwards the two men fell upon the ever-absorbing subject of chess, and lapsed into vigorous discussion over the relative merits of certain openings, such as the Scotch, the Giuoco Piano, the Ruy Lopez attack, Philidor’s defence, and the various gambits; to wit, the Queen’s, the Allgaier, the Evans, the Muzio, the Sicilian, and God knows what else. They did not favour the drawing-room for long after dinner, but went off to the library to put their theories into practice, leaving