William Barker was not a large man; neither was he small.  He was one of those men of medium height, whose physique deceives every one save the anatomical expert.  To the casual observer his weight would have been catalogued at about a hundred and forty.  At a glance Carroll knew that it was nearer a hundred and eighty.  Normal breadth of shoulder was more than made up for by unusual depth of chest.  Ready-made trousers bulged with the enormous muscular development of calf and thigh.  The face, clean-shaven, was sullen with the fear inspired by the sudden entrance of Carroll and Leverage; and there was more than a hint of evil in it.  As they watched, the sullenness of expression was supplanted by a leer, and then by a mask of professional placidity—­the bovine expression which one expects to find in the average specimen of masculine hired help.

The man’s demeanor was a combination of abjectness and hostility.  He was plainly frightened, yet striving to appear at ease.

Carroll and Leverage maintained silence.  Barker fidgeted nervously, and finally, when the strain became too great, burst out with: 

“Who are you fellers?  Whatcha want?”

Carroll spoke softly.

“William Barker?”

“What if that is my name?”

Carroll’s hands spread wide.

“Just wanted to be sure, that’s all.  You are William Barker?”

“An’ what if I am?  What you got to do with that?”

Carroll showed his badge.

“And this gentleman,” he finished, designating Leverage, “is chief of police.”

Barker’s voice came back to him in a half whine, half snarl.

“I ain’t done nothin’—­”

“Nobody has accused you yet.”

“Well, when you bust in on a feller like this—­”

Carroll seated himself, and Leverage followed suit.  He motioned Barker to a chair.

“Let’s talk things over,” he suggested mildly.

“Ain’t nothin’ to talk over.”

“You’re William Barker, aren’t you?”

“I ain’t said I ain’t, have I?”

Carroll’s eyes grew a bit harder.  His voice cracked out: 

“What’s your name?”

Barker met his gaze; then the eyes of the ex-valet shifted.

“William Barker,” he answered almost unintelligibly.

“Very good!  Now, sit down, William.”

William seated himself with ill grace.  Carroll spoke again, but this time the softness had returned to his tones.  His manner approached downright friendliness.

“We came here to talk with you, Barker,” he said frankly.  “We don’t know a thing about your connection with this case; but we do know that you were valet to Roland Warren, and therefore must possess a great deal of information about him which no one else could possibly have.  All we want is to learn what you know about this tragedy—­what you know and what you think.”

Barker raised his head.  For a long time he stared silently at Carroll.