But, from that moment, there was a noticeable change. There seemed more resisting power in the wasted body of the old clerk, as though hope for better things had grown up in him and was giving him strength.

To Matt, Newt Prebbles told what he knew about the accident to poor Harry Traquair.

Siwash Charley, under agreement with Murgatroyd, had tampered with Traquair's machine before the fatal flight, just as he had tampered with Matt's machine before the official trials at Fort Totten. But Traquair had not been so fortunate as the king of the motor boys.

Newt had learned of this villainous work through Siwash Charley, and had received from Siwash, at a time when the ruffian was under the influence of liquor, an incriminating note from the broker, signed with his alias, "George Hobbes."

Prebbles had made use of this document, holding it over Murgatroyd's head and extorting money from him on account of it.

This, of course, formed a sad commentary on the character of young Prebbles. But Motor Matt, in "advancing the spark of friendship," so played upon the facts in the case, and showed up the broker's duplicity, that the old clerk's illness formed the turning point in his son's career.

Such transformations are not so rare as it would seem.

Cameron, Matt, Ping, and Roscoe arrived at the post in the afternoon following the arrival of Matt and young Prebbles. Murgatroyd, of course, accompanied them.

Murgatroyd was tried, not on the Traquair charge, but on the later one of conniving, with Siwash Charley, to injure the aëroplane at the government trials, thus endangering the life, not only of Motor Matt, but of Lieutenant Cameron as well.

His sentence was commensurate with the evil he had attempted, and he followed Siwash Charley to the Leavenworth prison.