"Well, where in the world have you been?" asked Tubby.
"Where under the world, you mean," laughed Merritt; "but for a time it was no laughing matter, I assure you."
He then gave his fellow Scout a description of all they had undergone. When the excitement was over, word was given to get under way once more, and with the submarine leading, and the Viper following the red light, they held their courses toward the south.
It was dawn when they found themselves off a maze of small islands and islets. Donald had the wheel, and was gazing ahead as the submarine, at reduced speed, threaded her way among the shoals and sand bars.
All at once he saw something coming toward them that made his pulses beat far above normal.
It was a green motor boat, with a single military mast and a high cabin.
He lost no time in notifying everybody, and the submarine decks were soon crowded.
"Better get below, boys," warned the ensign; "that is undoubtedly the rascals' boat. In fact, Merritt says he recognizes it. They are desperate fellows, and when they see we have them cornered, they will put up a fight. If they run, I mean to pursue them to the bitter end."
Reluctantly the boys went below, while the ensign and Mr. Barr stood on the foredeck, revolvers in hand.
But although whoever was on the green boat must have seen them, the craft came right on.