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
