The cases opened proved to contain rifles, ten to a case. Some smaller boxes from the hold were found to hold cartridges to fit the rifles.
"A very bad business for you, Boggs," remarked Captain Foster.
"Why is it?" demanded Boggs gruffly.
"You were going to smuggle these arms and supplies into Mexico, across the river."
"Where's your proof?" demanded the tug's master cunningly.
"Our Mexican prisoners are proof enough," replied the Army captain, with a shrug of his shoulders. "That and some of the other wild doings of to-night. Captain Boggs, you will prepare to accompany us back to camp."
"Why?"
"Because you're a prisoner, charged with conspiring to break the laws of the United States."
"But who'll look after my boat?" demanded Boggs.
"She'll be under guard of a squad of my men, and your mate, deckhands and engine-room force will be enough to give the boat any care she really needs. Mr. Overton, march the Mexicans out of the cabin under guard."