“Fifth, Red Rob—that is, Hatfield—had his eye upon the casket. He followed Big Jap, found where he had hidden it, and stole it. Big Jap has only just discovered that it is missing, which accounts for his call at the central office this morning.”

“Good! next——”

“Sixth, Jasper Gregory became a leader of river-pirates simply because his nature demands that kind of excitement, unless, as may be the case, we find that he lost his fortune and took that way to get money.”

“Did you learn anything about the girl, Sara?”

“Not a word.”

“Well, let's call upon Mr. Hatfield at once. I fancy the interview will be interesting.”

The two detectives went at once to the hotel where they knew that Hatfield was to be found when he was in town.

The clerk informed them that Mr. Hatfield had just arrived that morning, and saying that they were old friends, the detectives took the elevator, and went up at once.

In answer to their rap upon the door a voice said:

“Come in.”