Presently a half dozen boats were lowered, filled with men, and taken in tow by a steam launch.
It was seen that they were making for the mouth of the river.
"Now let us go back," Ammon Quatia said.

"You will see what we shall do." Frank felt full of excitement.

He saw the English running into an ambuscade, and he determined, even if it should cost him his life, to warn them.

Presently they heard the sharp puffs of the steam launch.

The boats were within three hundred yards.
Frank stepped forward and was about to give a warning shout when Ammon Quatia's eye fell upon him.