CHAPTER III.
Mr.Foley pointed to an easy-chair.

Maraton, however, did not at once respond to his gesture of invitation.

He was standing, tense and silent, with head upraised, listening.

From the street outside came a strange, rumbling sound.
"You permit ?" he asked, stepping to the window and drawing the curtain a few inches on one side.

"There is something familiar about that sound.
I heard it last in Chicago." Mr.Foley rose slowly from the easy-chair into which he had thrown himself, and stood by his visitor's side.