The white man who had helped to carry the chest was now kneeling, busied at some work, though what it was Tom at first could not see. He was whittling the point of a stick into a long wooden peg, and when, by and by, he had finished what he was about, he arose and stepped to where he who seemed to be the captain had stuck his cane upright into the ground as though to mark some particular spot. He drew the cane out of the sand, thrusting the stick down in its stead. Then he drove the long peg down with a wooden mallet which the negro handed to him. The sharp rapping of the mallet upon the top of the peg sounded loud the perfect stillness, and Tom lay watching and wondering what it all meant.
The man, with quick-repeated blows, drove the peg farther and farther down into the sand until it showed only two or three inches above the surface. As he finished his work there was another faint flash of light, and by and by another smothered rumble of thunder, and Tom, as he looked out toward the westward, saw the silver rim of the round and sharply outlined thundercloud rising slowly up into the sky and pushing the other and broken drifting clouds before it.
The two white men were now stooping over the peg, the negro man watching them. Then presently the man with the cane started straight away from the peg, carrying the end of a measuring line with him, the other end of which the man with the plaited queue held against the top of the peg. When the pirate captain had reached the end of the measuring line he marked a cross upon the sand, and then again they measured out another stretch of space.
So they measured a distance five times over, and then, from where Tom lay, he could see the man with the queue drive another peg just at the foot of a sloping rise of sand that swept up beyond into a tall white dune marked sharp and clear against the night sky behind. As soon as the man with the plaited queue had driven the second peg into the ground they began measuring again, and so, still measuring, disappeared in another direction which took them in behind the sand dune where Tom no longer could see what they were doing.
The negro still sat by the chest where the two had left him, and so bright was the moonlight that from where he lay Tom could see the glint of it twinkling in the whites of his eyeballs.
Presently from behind the hill there came, for the third time, the sharp rapping sound of the mallet driving still another peg, and then after a while the two pirates emerged from behind the sloping whiteness into the space of moonlight again.
They came direct to where the chest lay, and the white man and the black man lifting it once more, they walked away across the level of open sand, and so on behind the edge of the hill and out of Tom's sight.
III
Tom Chist could no longer see what the pirates were doing, neither did he dare to cross over the open space of sand that now lay between them and him. He lay there speculating as to what they were about, and meantime the storm cloud was rising higher and higher above the horizon, with louder and louder mutterings of thunder following each dull flash from out the cloudy, cavernous depths. In the silence he could hear an occasional click as of some iron implement, and he opined that the pirates were burying the chest, though just where they were at work he could neither see nor tell.
Still he lay there watching and listening, and by and by a puff of warm air blew across the sand, and a thumping tumble of louder thunder leaped from out the belly of the storm cloud, which every minute was coming nearer and nearer. Still Tom Chist lay watching.
Suddenly, almost unexpectedly, the three figures reappeared from behind the sand hill, the pirate captain leading the way, and the negro and white man following close behind him. They had gone about halfway across the white, sandy level between the hill and the hummock behind which Tom Chist lay, when the white man stopped and bent over as though to tie his shoe.
This brought the negro a few steps in front of his companion.
That which then followed happened so suddenly, so unexpectedly, so swiftly, that Tom Chist had hardly time to realize what it all meant before it was over. As the negro passed him the white man arose suddenly and silently erect, and Tom Chist saw the white moonlight glint upon the blade of a great dirk knife which he now held in his hand. He took one, two silent, catlike steps behind the unsuspecting negro. Then there was a sweeping flash of the blade in the pallid light, and a blow, the thump of which Tom could distinctly hear even from where he lay stretched out upon the sand. There was an instant echoing yell from the black man, who ran stumbling forward, who stopped, who regained his footing, and then stood for an instant as though rooted to the spot.
Tom had distinctly seen the knife enter his back, and even thought that he had seen the glint of the point as it came out from the breast.
Meantime the pirate captain had stopped, and now stood with his hand resting upon his cane looking impassively on.
Then the black man started to run. The white man stood for a while glaring after him; then he, too, started after his victim upon the run. The black man was not very far from Tom when he staggered and fell. He tried to rise, then fell forward again, and lay at length. At that instant the first edge of the cloud cut across the moon, and there was a sudden darkness; but in the silence Tom heard the sound of another blow and a groan, and then presently a voice calling to the pirate captain that it was all over.
He saw the dim form of the captain crossing the level sand, and then, as the moon sailed out from behind the cloud, he saw the white man standing over a black figure that lay motionless upon the sand.
