"Help!" he signalled by flashes in the Morse code. "Help!"
"It is such a tiny glow, to carry so far!" sighed the Englishman.
"Maybe id vill seen be," said Captain Kennor.
Dave continued to signal until, to his great joy, there came an answering signal from a blinker light which asked:
"Who are you?"
"Four castaways, clinging to a spar. Help before we freeze!" Dave flashed back, desperately.
"If only the commander of that boat does not suspect us of being a German submarine springing a trap!" cried the Englishwoman.
A searchlight flashed up, then its broad beam stretched across the waters as the operator tried to pick up the floating ones.
Dave threw the flash into a continuous light while the searchlight beam continued groping. Then, in a blessed instant, the beam struck almost blindingly across the spar and the four human beings held up by it.
"Now, they've spotted us," Dave cried, exultingly. "They won't run away and leave us without a look-in."