Big Bob opened his eyes wider, shot out one hairy hand, gave a convulsive motion which shook his great frame so that the floor of the frail hut trembled, and then the end came. Later, when the body was given rude burial, the original will was found in a pocket of the dead man's coat, together with letters from his brother, Cole Tolford, asking him to go to New York, search out Mother Scanlon, and protect his son.

"Congratulations are in order, Mr. Black Bear!" Shaw whispered, as the papers were handed to Fremont, "but, somehow, I feel like waiting until we get back to little old New York before showing any enthusiasm. This has been a tragic trip."

The other members of the party seemed to feel the same way, for the revelation of the dreadful plot and the death of Samuel Tolford, known as Big Bob, had cast a gloom over the party which not even the clearing up of the mystery could shake off.

CHAPTER XXV.

READY FOR THE CANAL ZONE.

"This is the end of the case," Frank Shaw said, covering the face of the dead man with a handkerchief. "Fremont is free to go back to New York, taking his mine with him! Nestor was right when he declared that the solution of the Cameron mystery lay on this side of the Rio Grande."

"But the object of our visit has not yet been accomplished," Nestor said, "and so I can't go back with you. Perhaps you would better leave me in charge of the mine!"

"You are wrong," Lieutenant Gordon said, then, "the object of our journey is accomplished. I was ready to announce the fact when you stopped me to listen to the last words of the poor wretch who lies there."

"Do you mean that the arms and ammunition were stopped on the other side?" demanded Nestor.