The butler shook his head and jerked his thumb towards the open door of the study.

“The fact is, we don’t know where Mr. Herapath is, sir,” he answered. “He hasn’t slept in his bed, and he isn’t in the house.”

“Possibly he didn’t come home last night,” suggested Selwood. “He may have slept at his club, or at an hotel.”

The butler and the coachman looked at each other—then the coachman, a little, sharp-eyed man who was meditatively chewing a bit of straw, opened his tightly-compressed lips.

“He did come home, sir,” he said. “I drove him home—as usual. I saw him let himself into the house. One o’clock sharp, that was. Oh, yes, he came home!”

“He came home,” repeated Kitteridge. “Look here, sir.” He led the way into the study and pointed to a small table set by the side of Herapath’s big business desk. “You see that tray, Mr. Selwood? That’s always left out, there, on that table, for Mr. Herapath every night. A small decanter of whiskey, a syphon, a few sandwiches, a dry biscuit or two. Well, there you are, sir—he’s had a drink out of that glass, he’s had a mouthful or so of sandwiches. Oh, yes, he came home, but he’s not at home now! Charlesworth—the valet, you know, sir—always goes into Mr. Herapath’s room at a quarter past seven every morning; when he went in just now he found that Mr. Herapath wasn’t there, and the bed hadn’t been slept in. So—that’s where things stand.”

Selwood looked round the room. The curtains had not yet been drawn aside, and the electric light cast a cold glare on the various well-known objects and fittings. He glanced at the evidences of the supper tray; then at the blotting-pad on Herapath’s desk; there he might have left a note for his butler or his secretary. But there was no note to be seen.

“Still, I don’t see that there’s anything to be alarmed about, Kitteridge,” he said. “Mr. Herapath may have wanted to go somewhere by a very early morning train——”

“No, sir, excuse me, that won’t do,” broke in the butler. “I thought of that myself. But if he’d wanted to catch a night train, he’d have taken a travelling coat, and a rug, and a bag of some sort—he’s taken nothing at all in that way. Besides, I’ve been in this house seven years, and I know his habits. If he’d wanted to go away by one of the very early morning trains he’d have kept me and Charlesworth up, making ready for him. No, sir! He came home, and went out again—must have done. And—it’s uncommonly queer. Seven years I’ve been here, as I say, and he never did such a thing before.”

Selwood turned to the coachman.