"Well, have you heard anything of your sister?" he asked, with an appearance of interest.
"Not yet," answered Dan.
"That's a pity. Do you go up to Harlem every day?"
"Yes."
"Keep on, you will find her in time."
After they parted, Dan, happening to look back, detected a mocking glance in the face of his questioner, and a new discovery flashed upon him. Hartley was making a fool of him. He had sent him to Harlem, purposely misleading him.
"What can be his object?" thought Dan. "Can he have had anything to do with the abduction of Althea?"
This was a question which he could not satisfactorily answer, but he resolved to watch Hartley, and follow him wherever he went, in the hope of obtaining some clew. Of course he must assume some disguise, as Hartley must not recognize him.
Finally Dan decided upon this plan.