This seemed surely to show that he had to do with that which is beyond and above natural. Yet there were points against that view, too. There was, first of all, the spot of blood, for in the passage between the servant's room and the kitchen he saw what seemed to be a spot of blood. The carpet was a brown pattern on a pink ground, and in one place the brown looked redder than elsewhere,--that was all. If it was blood, then the bullet shot by him, which he now found imbedded in the frame of the kitchen-door, may have passed through some part of a man; but he could not assert to himself that it was blood. There were, however, the pictures. Unless he was dancing mad, the fact was certain that he had left only three of them with their backs undone, and now there were five--and he refused to believe that he was indeed moonstruck. So, then, a man had been in the flat, since no ghost could materialize to the extent of picking tacks out of picture-frames. And, if there had been a man, that man was Van Hupfeldt, and no other. Van Hupfeldt's motive would be clear enough. Miss L'Estrange had told Van Hupfeldt that the certificates had fallen out of the back of a picture. David himself had had the rashness, in his rage at the loss of the certificates, to say over the door of Van Hupfeldt's landau that there "might be other things where the certificates came from." Mrs. Grover had been seen that afternoon talking to Van Hupfeldt's servant. She was evidently in process of being bribed and won over to the enemy. She may have told how David had had all the pictures taken down and was at work on them, and how he was to be out at an annual dinner that night. She may possibly have handed over to Van Hupfeldt the key of the flat, and Van Hupfeldt, in a crazy terror lest anything should be found by David in the pictures, may have come into the flat to search for himself. All this seemed plausible enough. But, then, how had Van Hupfeldt got away? Had he a flying-machine? Was he a griffin? Were there holes in the wall? But if, as a matter of fact, he or some other had been in the flat, and had some way got out other than by the front door, here was a new thought--that Gwendoline Mordaunt may not, after all, have committed suicide. Suicide had been assumed simply because of the locked and bolted front door. But how if there existed some other mysterious exit from the flat? In that case she might have been done to death--by Strauss, by Van Hupfeldt, if Van Hupfeldt was Strauss.