He made for a little no answer, and we were both indeed by this time taken up with the withdrawal of the two other members of our group. They moved away together across the shining floor, pausing, looking up at the painted vault, saying the inevitable things—bringing off their retreat, in short, in the best order. It struck me somehow as a retreat, and yet I insisted to myself, once more, on its being perfectly natural. At the high door, which stood open, they stopped a moment and looked back at us—looked frankly, sociably, as if in consciousness of our sympathetic attention. Mrs. Server waved, as in temporary farewell, a free explanatory hand at me; she seemed to explain that she was now trying somebody else. Obert moreover added his explanation. "That's the way she collars us."

"Oh, Long doesn't mind," I said. "But what's the way she strikes you as different?"

"From what she was when she sat to me? Well, a part of it is that she can't keep still. She was as still then as if she had been paid for it. Now she's all over the place." But he came back to something else. "I like your talking, my dear man, of what you 'don't perceive.' I've yet to find out what that remarkable quantity is. What you do perceive has at all events given me so much to think about that it doubtless ought to serve me for the present. I feel I ought to let you know that you've made me also perceive the Brissendens." I of course remembered what I had said to him, but it was just this that now touched my uneasiness, and I only echoed the name, a little blankly, with the instinct of gaining time. "You put me on them wonderfully," Obert continued, "though of course I've kept your idea to myself. All the same it sheds a great light."

I could again but feebly repeat it. "A great light?"

"As to what may go on even between others still. It's a jolly idea—a torch in the darkness; and do you know what I've done with it? I've held it up, I don't mind telling you, to just the question of the change, since this interests you, in Mrs. Server. If you've got your mystery I'll be hanged if I won't have mine. If you've got your Brissendens I shall see what I can do with her. You've given me an analogy, and I declare I find it dazzling. I don't see the end of what may be done with it. If Brissenden's paying for his wife, for her amazing second bloom, who's paying for Mrs. Server? Isn't that—what do the newspapers call it?—the missing word? Isn't it perhaps in fact just what you told me last night you were on the track of? But don't add now," he went on, more and more amused with his divination, "don't add now that the man's obviously Gilbert Long—for I won't be put off with anything of the sort. She collared him much too markedly. The real man must be one she doesn't markedly collar."

"But I thought that what you a moment ago made out was that she so markedly collars all of us." This was my immediate reply to Obert's blaze of ingenuity, but I none the less saw more things in it than I could reply to. I saw, at any rate, and saw with relief, that if he should look on the principle suggested to him by the case of the Brissendens, there would be no danger at all of his finding it. If, accordingly, I was nervous for Mrs. Server, all I had to do was to keep him on this false scent. Since it was not she who was paid for, but she who possibly paid, his fancy might harmlessly divert him till the party should disperse. At the same time, in the midst of these reflections, the question of the "change" in her, which he was in so much better a position than I to measure, couldn't help having for me its portent, and the sense of that was, no doubt, in my next words. "What makes you think that what you speak of was what I had in my head?"

"Well, the way, simply, that the shoe fits. She's absolutely not the same person I painted. It's exactly like Mrs. Brissenden's having been for you yesterday not the same person you had last seen bearing her name."

"Very good," I returned, "though I didn't in the least mean to set you digging so hard. However, dig on your side, by all means, while I dig on mine. All I ask of you is complete discretion."

"Ah, naturally!"

"We ought to remember," I pursued, even at the risk of showing as too sententious, "that success in such an inquiry may perhaps be more embarrassing than failure. To nose about for a relation that a lady has her reasons for keeping secret——"