"but I must decline to talk about the motor. May I ask where you
obtained your information concerning it?"

"Why, I am not at liberty to tell," went on the man. "I called to
see if we could negotiate with you for the sale of it. Parties whom
I represent--"

At that moment Tom plucked his father by the sleeve.

"Dad," whispered the youth, "I saw him in Mansburg. I think he is
one of several who have been inquiring in Mr. Merton's shop about
you and your patents. I wouldn't have anything to do with him until
I found out more about him."

"Is that so?" asked Mr. Swift quickly. Then, turning to the
stranger, he said: "My son tells me--"

But Mr. Swift got no further, for at that moment the stranger caught
sight of Tom, whom he had not noticed before.

"Ha!" exclaimed the man. "I have forgotten something--an important
engagement--will be back directly--will see you again, Mr. Swift--
excuse the trouble I have put you to--I am in a great hurry," and
before father or son could stop him, had they any desire to, the man
turned and walked quickly from the yard.

Mr. Swift stood staring at him, and so did Tom. Then the inventor
asked:

"Do you know that man? What about him, Tom? Why did he leave so