“That’s what he did,” added his twin.

Jack said nothing. For some reason he could not fathom, the strange young man had not altogether appealed to him. Yet, what there was about Joe Brooks he did not like was something he could not put into words.

Less than half an hour after Joe Brooks had left the Rover boys he entered a hotel in one of the shabby sections of Chicago. Here he fell in with Carson Davenport and a few minutes later the pair were joined by two other men.

“Well, did you find out anything more?” questioned the man from the oil fields.

“I think I’ve found out everything we want to know,” answered Joe Brooks.

“Then you found out where they’re stopping?”

“Didn’t have to. I ran right into the four boys on the street.”

“Well, you certainly were lucky!”

“I hung around the station for three hours before that,” answered Brooks. “At first I thought I’d call up the leading hotels by telephone; but I was afraid that might look suspicious. So then I thought I’d go out and take a look around. I didn’t expect to see them, and I only thought I could fill in time until to-morrow morning, when they were to take that train for which they bought accommodations in New York. I thought maybe I could have a chance to talk to them before they left and get a few particulars. But now I think I’ve got everything we need.”

“Let’s go upstairs and talk it over,” said Carson Davenport. “No use of letting anybody else in on this. There are too many open ears around down here.”