“Sounds queer.”

“And, talking of that picture, I looked in on him about a couple of afternoons later, and he’d taken it down from the wall and laid it on the floor and was staring at it in a dashed marked sort of manner.  That was peculiar, what?”

“On the floor?”

“On the jolly old carpet.  When I came in, he was goggling at it in a sort of glassy way.  Absolutely rapt, don’t you know.  My coming in gave him a start—­seemed to rouse him from a kind of trance, you know—­and he jumped like an antelope; and, if I hadn’t happened to grab him, he would have trampled bang on the thing.  It was deuced unpleasant, you know.  His manner was rummy.  He seemed to be brooding on something.  What ought I to do about it, do you think?  It’s not my affair, of course, but it seams to me that, if he goes on like this, one of these days he’ll be stabbing, someone with a pickle-fork.”

To Archie’s relief, his father-in-law’s symptoms showed no signs of development.  In fact, his manner reverted to the normal once more, and a few days later, meeting Archie in the lobby of the hotel, he seemed quite cheerful.  It was not often that he wasted his time talking to his son-in-law, but on this occasion he chatted with him for several minutes about the big picture-robbery which had formed the chief item of news on the front pages of the morning papers that day.  It was Mr. Brewster’s opinion that the outrage had been the work of a gang and that nobody was safe.

Daniel Brewster had spoken of this matter with strange earnestness, but his words had slipped from Archie’s mind when he made his way that night to his father-in-law’s suite.  Archie was in an exalted mood.  In the course of dinner he had had a bit of good news which was occupying his thoughts to the exclusion of all other matters.  It had left him in a comfortable, if rather dizzy, condition of benevolence to all created things.  He had smiled at the room-clerk as he crossed the lobby, and if he had had a dollar, he would have given it to the boy who took him up in the elevator.

He found the door of the Brewster suite unlocked which at any other time would have struck him as unusual; but to-night he was in no frame of mind to notice these trivialities.  He went in, and, finding the room dark and no one at home, sat down, too absorbed in his thoughts to switch on the lights, and gave himself up to dreamy meditation.

There are certain moods in which one loses count of time, and Archie could not have said how long he had been sitting in the deep arm-chair near the window when he first became aware that he was not alone in the room.  He had closed his eyes, the better to meditate, so had not seen anyone enter.  Nor had he heard the door open.  The first intimation he had that somebody had come in was when some hard substance knocked against some other hard object, producing a sharp sound which brought him back to earth with a jerk.