As they had been speaking, the housekeeper had instinctively stepped aside, and Gordon had passed her. Now he started up the stairs, in the direction of the study.

“You’ll have some lunch ready at the usual time?” he asked, looking back over his shoulder.

“Of course, sir,” was the reply; and that was all that was said.

If the new arrival had been Nick himself, he would have smilingly apologized to Mrs. Peters for having broken in so unexpectedly upon her well-earned relaxation, but Green Eye was altogether too selfish to think of such things.

Thus far he had played his part very well, but there were many pitfalls in his path, and there was no knowing at what moment he might fall into one of them. His eyes were not Nick’s eyes, and his disposition was not Nick’s disposition—far from it, in fact.

At any moment his innate harshness and tyranny might assert themselves.

Moreover, his habits were unlike those of the detective. He smoked much more, for one thing, and he drank. Nick, to be sure, had consumed many a glass of beer and wine—for effect and under protest—but he had no real liking for anything of the sort, and no one had had a better opportunity than he to note the evil effects of drink.

Naturally, Gordon had resolved to deny himself whenever he was under the eye of those who were familiar with Nick’s habits, but it remained to be seen whether he would succeed in keeping to that resolution.

Already he had forgotten one little thing which might have caused him embarrassment, and might still do so, for that matter. He had meant to offer some plausible explanation of his failure to let himself in with a latchkey, but he had forgotten all about it at the time, and now it might seem strange if he brought up the subject.

He had not come straight to the house from the changing room on One Hundred and Twenty-fifth Street, but had shown himself in one or two places where Nick was well known, his idea being to see if his disguise would pass inspection elsewhere before submitting himself to the scrutiny of Nick’s household. That had consumed some time; consequently, the luncheon hour was near when he arrived at the house.