Robin raised his free hand and pointed over the boat's gunwale across the water.
"Look!" he cried. "What can it mean?"
CHAPTER XVI.
THE GREEN LIGHT UPON THE SEA.
JACOB was on his feet in a moment. His eyes were dazed by a strange pale-green light that shone luminous over the boat's larboard bow. The sea was calm, with only a gentle swell rolling from the east; the sky was black and starless, and all was dark around saving only in the one direction where shone the ghostly green light, that reared itself like a cloud of radiant mist out of the sea, only a few yards from where he stood.
Even as he gazed upon it, bewildered and speechless, the light seemed to approach, or else it was the boat that sailed into the luminance. It shed its ghastly green glare upon everything, making all on board as plain as though the craft were bathed in soft moonlight. All was as green as grass. Webbe, Timothy, and Gilbert stood staring about them like phantoms, silently glancing at one another with the emotions of men who had been suddenly hurried into another world. Their faces, their clothing, even their hair was green, and it seemed that the mysterious light had deprived them of speech, for none spoke.
Timothy Trollope, who had been at the helm, had suddenly ceased to pay any regard to the steering, and now the boat's sail swayed idly to and fro, empty of wind. Gilbert Oglander, regaining his sober senses, looked over the side to search for the origin of the strange radiance. But there was no flame to the light, which seemed to be a mere transparent shaft of air, as unsubstantial as a rainbow. And when he turned to see if Jacob Hartop were yet awake, and found the old man at his side, he implored an explanation of the mystery.
"What means it, Master Hartop?" he asked in an awe-stricken voice. "Hast seen its like ever before?"
But the old buccaneer made no answer. Clambering over the coaming of the well, he crept on hands and knees towards the bow near where Gilbert stood. He peered out into the light, gripping the gunwale with trembling hands. He remained thus for many moments. Then suddenly he drew back, flung his left arm round Gilbert's legs, and with a wild, frantic cry upon his lips pointed out with his skinny right hand into the midst of the green light.