“That’s so,” cried Norah. “A woman’s head is smaller than a man’s, but her hair makes it appear larger in a shadow. Unless, as Mr. Hudson says, she wore it wrapped round her head,—and didn’t have much, anyway.” “You go outside, Mr. Brice,” directed Hudson, “and look at the shadows of me and Miss MacCormack, and then come back and tell us what you can notice.” I did this, and the two heads were shadowed forth on the same door that I had watched the day before. But the brighter daylight made the shadows even more vague than yesterday, and I returned without much information. “I could tell which was which, of course,” I reported, “but it’s true that if I hadn’t known you people at all, I could have mistaken Norah’s head for a man, and I might have believed, Hudson, that you were a woman. It’s surprising how little individuality was shown in the shadows.” “Well, of course they were clearer yesterday, as the hall was darker,” mused Hudson. “After all, Mr. Brice, your testimony can’t amount to much unless we can get the actual murderer behind that glass, and some peculiar shape or characteristic makes you recognize the head beyond all doubt.” “I think I could do that,” I returned; “for though I can’t describe any peculiarity, I’m sure I’d recognize the same head.” “You are?” and Hudson looked at me keenly. “Well, perhaps we’ll try you out on that.” They had a definite suspect, then. And they proposed to experiment with my memory. Well, I was ready, whenever they were. Norah and I went into the third room, Hudson making no objection. At another time we would have been deeply interested in the pictures and the furnishings but now we had eyes and thoughts only for one thing. We looked behind the war map and saw the elevator door, but could not open it. “The car’s down,” spoke up Hudson, who was watching us sharply. “I dunno will it ever be used again. Though I suppose these rooms will be let to somebody else, some time. Mr. Gately’s things here will be sent to his house, I expect, but his estate is a big one and will take a deal of settling.” “Who’s his executor?” “Mr. Pond, his lawyer. But his financial affairs are all right. Nothing crooked about Amos Gately—financially. You can bank on that!”