The young motorist, taking the paper, opened it and read as follows:
"For the sum of one hundred dollars, receipt of which is hereby acknowledged, I agree to enter the Borden cup race with a Stark-Frisbie car, and to do my utmost to throw the race in favor of the Bly-Lambert contestants.
"Signed, Matt King."
The white rushed into Motor Matt's face. With a gasp he dropped back into his chair, staring with wide eyes at Colonel Plympton.
[CHAPTER V.]
MATT GOES TROUBLE-HUNTING.
No matter how firmly convinced Colonel Plympton had been regarding Matt's treacherous intentions, the tremendous shock the note gave him was too real to be feigned.
"Isn't that your signature, King?" demanded Plympton.
"Yes, sir, so far as I can see; but certainly I never signed any paper like that. I'm not that sort of a fellow, Colonel Plympton. Did Ralph Sercomb deliver that paper to you?"
"I don't know why I should make a secret of it. Yes, he did; but it was because he had the interests of the Stark-Frisbie Company at heart."