“Wrecking my aeroplane, by chopping and battering it to pieces when it was housed under the sheds of this hotel.”

The detective rose from the side of the bed and stood upright in the gloom in front of his young friend.

“What in the name of the seven wonders put that fancy into your head?”

“Why,” replied Harvey hesitatingly, not expecting such an implied contradiction; “it couldn’t have been any one else.”

“Well, it was some one else; Professor Morgan had no more to do with destroying your biplane than King George V.”

The amazed Harvey stared in astonishment.

“Bunk saw him sneaking out of the back of the shed early in the morning, when he went to look at the machine.”

“Did the Professor have an axe or hatchet in his hand?”

“I believe not.”

“Having told you what he did not do, can you now form an idea of what he did do?”