"I wired, last night, for a fast gasoline boat to be sent here to aid us," continued Captain Foster. "This coming craft is the answer to my prayer, and the nearest collector of customs informs me that she's the swiftest thing he could charter for the government in these waters."
"Then, sir, if the Mexicans try to put their motor boat across the river to-night there'll be some real doings!" promised Lieutenant Overton.
"Real doings," indeed! The border excitement was about to break loose in deadly earnest, but that was more than any of them knew at that time.
CHAPTER XVIII
AN ACT OF PIRACY
MOVING slowly, with the graceful ease of a monster swan, the motor boat, a craft under sixty feet in length, moved into the pier to shoreward of the tug.
"Motor boat 'Restless'?" hailed Captain Foster.
"Yes, sir," came quietly from the youthful-looking sailor at the wheel. Just then he quitted his post.
"Captain Halstead?"