This was not a pleasant suggestion. Frank had but a few cartridges left and the others had only their knives. These would be small protection against savages if any of the forest dwellers had really gone adrift on the floating island. It was not a cheerful party that sat down to another meal of oysters and fruit that evening. Moreover the water supply of the little party was almost exhausted and without water they faced a terrible death.
Because of the unknown dangers which, it was felt, surrounded them it was decided to set a watch that night and keep the fire burning through the dark hours. Harry and Ben were to share the first watch and Frank and Billy agreed to take the second one. Nothing had occurred when Ben, at midnight, aroused Frank and the young reporter and told them it was time to go on duty.
The boys had been on sentry duty for perhaps an hour with nothing but the lapping of the waves against the shore of the floating island to break the deep stillness, when suddenly both were startled by a strange and terrible cry that rang through the forest.
With beating hearts they leaped to their feet and strained their ears to see if they could ascertain the origin of the uncanny cry, but they heard nothing more.
Hardly had they resumed their places by the fire, however, before the wild screams rang out again.
"It's some human being," cried Frank.
"They are being killed or something!" cried the affrighted Billy
Barnes.
By this time Ben Stubbs and Harry had awakened and were sitting up with scared looks on their faces.
"Seems to come from near at hand," suggested Ben.
Suddenly the yell sounded quite close, and at the same instant it was echoed by the boys as a dozen or more dark forms dashed out of the dark shades of the forest and rushed toward them. Half unnerved with alarm at this sudden and inexplicable attack, Frank fired point-blank into the onrush, and two of the dark forms fell. Their comrades, with the same wild shrieks that had so alarmed the boys, instantly turned and fled, awakening the echoes of the woods with their terrifying clamor.