The door at the other end of the boat opened on to a solid wall of rock, so that no light could escape from that end.

Harriet was about to resume her seat at the table, when she paused sharply, raising her hand as a signal for silence.
"What is it, dear ?" asked Miss Elting in a low voice.
"I heard a shout.

There is it again.

Did you hear ?" The guardian and the other girls nodded.
"It isn't far from here.

May I go down to the end of the creek and find out what it means ?" "Wait a moment." The guardian turned down the light, then stepped out to the after deck, followed by the girls.