He waited for a while, and then arose and stepped to the top of the sand-hummock behind which he had been lying. He looked all about him, but there was no one else to be seen. Then he stepped down from the hummock and followed in the direction which the pirate captain and the two men carrying the chest had gone. He crept along cautiously, stopping now and then to make sure that he still heard the counting voice, and when it ceased he lay down upon the sand and waited until it began again.

Presently, so following the pirates, he saw the three figures again in the distance, and, skirting around back of a hill of sand covered with coarse sedge-grass, he came to where he overlooked a little open level space gleaming white in the moonlight.

The three had been crossing the level of sand, and were now not more than twenty-five paces from him. They had again set down the chest, upon which the white man with the long queue and the gold ear-rings had seated to rest himself, the negro standing close beside him. The moon shone as bright as day and full upon his face. It was looking directly at Tom Chist, every line as keen cut with white lights and black shadows as though it had been carved in ivory and jet. He sat perfectly motionless, and Tom drew back with a start, almost thinking he had been discovered. He lay silent, his heart beating heavily in his throat; but there was no alarm, and presently he heard the counting begin again, and when he looked once more he saw they were going away straight across the little open. A soft, sliding hillock of sand lay directly in front of them. They did not turn aside, but went straight over it, the leader helping himself up the sandy slope with his cane, still counting and still keeping his eyes fixed upon that which he held in his hand. Then they disappeared again behind the white crest on the other side.

So Tom followed them cautiously until they had gone almost half a mile inland. When next he saw them clearly it was from a little sandy rise which looked down like the crest of a bowl upon the floor of sand below. Upon this smooth, white floor the moon beat with almost dazzling brightness.

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 in 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 towards 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 half-way 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.