[CHAPTER XXII.—ISA ISBAN.]

Late that same afternoon the five boys were riding westward, when Frank said:

“Something mysterious has happened, fellows.”

“What is it?” asked Jack, who was instantly interested in any mystery.

“A short time ago I saw a horseman away down the road here.”

“Yes.”

“He was coming toward us.”

“Well?”

“We have not met him.”

“No.”