more about it. You were not able to make out the
name of the boat, but you must have had a good look at her for
descriptive purposes."

"Not very, sir; the boat had canvas over its woodwork. I am afraid, sir,
that, if I saw the same boat in daylight, I couldn't positively identify
her."

"We have duties to perform, now, Mr. Overton. Instruct your sergeant
that he is, under no circumstances, to allow the tug to leave the pier,
except under orders. Then come with me."

A minute later Hal and his superior officer were walking briskly up the
street.

"There's a telephone cable under the river to Tres Palmas," explained
Captain Foster. "You will therefore call up the operator there, and you
will explain to-night's incident of the motor boat, and ask him to
notify the Mexican federal authorities. That's all that's left to us
now. While you are doing that I will telephone both up and down the
river, calling on the state authorities to seize that fast motor boat,
if they can catch it on the American side."

The telephone messages were sent, and the two officers retraced their
way to the tug. The message that went under the river to Mexico, as
Captain Foster learned long afterward, did not reach the federal
government of that sister republic, for the telephone office, for three
hours that night, was held by a roving band of Mexican rebels who
succeeded in intercepting many government messages and in learning the
plans of the Mexican government for crushing these same rebels.

"Mr. Overton," said Hal's superior officer, when they reached the boat,
"you will find berths in the cabin of the boat. Get into one of them and
sleep until breakfast-time unless you are called earlier. I will now
make myself responsible for the watch along the river."

It was full breakfast-time, at eight in the morning, therefore, when one
of the soldiers touched Hal on the shoulder.

"Captain Foster's compliments to Lieutenant Overton, who is directed to
report on deck to the captain."

"Mr. Overton," announced the superior officer, as soon as his
"youngster" appeared on deck, "I am going up to the camp for the day,
unless you send me word that I am needed. I have just breakfasted, and
the cook of this craft will take your orders as to your own breakfast."

"Have the men breakfasted, sir?" was Hal's first thought and question.
A really good officer always thinks first of his men.

"They have all breakfasted, Mr. Overton. I do not imagine yo