He slowed down even more, and, striking a match, lighted the searchlight, which, until this moment, he had not deemed advisable.

As the light flashed over the water, the lad made out another small motorboat dead ahead, upon which signs of life became apparent. Jack saw figures gesticulating violently; then the boat headed directly for the one occupied by the two boys.

"Guns, Frank!" said Jack quietly. "They are coming at us."

"Leave it to me," replied Frank. "You run the boat. I'll do the rest."

"Don't shoot unless you have to," warned Jack.

Frank made no reply.

Jack kept the light full upon the approaching boat. He could see several oilskin-clad figures and that was all; and then came a hail from the oncoming boat.

"What do you want here?"

The query was in English. Jack answered the hail.

"What are you doing here yourself?" he demanded. "We are British officers. I command you to surrender."