"Wha-a-at?" says Mr. Robert. "In a fool's costume? You say he went out in that rig? Why the deuce should he——"

"I didn't ask the mawster, sir," says Nimms, "but my private opinion of the matter, sir, is that he was on 'is way to a masked banquet of some sort. I 'appened to see a hinvitation, sir, that——"

"Dig it up, Nimms," says I. "Might be a clue."

Sure enough, Nimms had it stowed away; and the fathead hadn't said a word about it before. It's an invite to the annual costume dinner of the Bright Lights Club.

"Huh!" says I. "I've heard of that bunch—mostly producers, stage stars and dramatists. Branch of the Lambs Club. Whitey would have known about that event, too. And Alf. Shuman. If Deems had been there they'd have known. So he didn't get there. I expect he wore a rain coat or something over his costume, and went in a taxi; eh, Nimms?"

"Quite so, sir," says Nimms. "A long raincoat, sir."

"But," breaks in Mr. Robert, "a man couldn't wander around New York dressed in a fool's costume without being noticed. That is, not for several days."

"You bet he couldn't," says I. "So he didn't."

That's a good line to pull, that "he couldn't, so he didn't," when you're doin' this Sherlock-Watson stuff. Sounds professional. Mr. Robert nods and then looks at me expectant as if he was waitin' to hear what I'd deduce next. But as a matter of fact my deducer was runnin' down. Yet when you've got a boss who always expects you to cerebrate in high gear, as he's so fond of puttin' it, you've got to produce something off-hand, or stall around.

"Now, let's see," says I, registerin' deep thought, "if Penrhyn was to go anywhere on his own hook, where would it be? You know his habits pretty well, Mr. Robert. What's your guess?"