The boys now realized that they were in a dangerous position and began to back away, while the intruder moved toward the wharf. But suddenly there was a second change in the situation. Another man appeared on the scene.

This new arrival also had a pistol. He stepped out of the shadow of the bluff, pointed his weapon at the smuggler, and commanded:

“Drop that gun, or I’ll shoot.”

A great shudder shook Gunseyt. A gasp escaped his lips, and he dropped his firearm. As it hit the deck the man on the wharf said:

“Pick up his gun, boys, and stand ready to help if he gets ugly.”

Walter sprang forward and snatched up the weapon. Then the newcomer stepped aboard and snapped a pair of “bracelets” on the wrists of Gunseyt.

“I’m a secret service man,” he announced as he secured the prisoner.

“Did Mr. Watson send you?” Guy inquired.

“Yes.”

“Why didn’t he come himself?”