He did not mention what he had found to the coroner, when the latter returned.
"Greig," said Britz to his bulky companion, "go out and fetch a step-ladder.

Let us examine the walls and ceiling." Greig hastened out of the office, returning in a few minutes with the ladder.

The two detectives devoted half an hour to sounding the walls and ceiling, while the coroner wrote out the necessary permit for the removal of the body.
"Everything is absolutely solid," declared Britz, when he had finished his examination.

"There are no panels in the wall through which the assassin might have entered." "That's what I thought," beamed the coroner.

"The murderer entered and left through the door.