one saw the slayer enter or leave. In fact, he did not enter through the door."

"Then how did he get in?" demanded the coroner. "Through the wall? Or did he fire through the ceiling or floor?"

"As I said before, there is no secret panel in this room," was Britz's rejoinder.

"Then you believe Mr. Whitmore committed suicide?" suddenly fired the coroner.

"No."

"He might have committed suicide, and the clerks, out of regard for their employer, substituted pistols in order to make it appear like murder," joined Greig.

"Perhaps," replied Britz. "Relatives and friends frequently endeavor to give a case of suicide the aspect of murder."

"But you don't really believe it of this case?" asked the coroner.

"I do not," confessed Britz.

"Then your theory must be that some invisible person fired a silent shot"—the coroner paused a moment, then as if struck by a sudden thought—"of course, a Maxim muffler might have deadened the sound of the pistol."