"We must put on the hatches," he said decisively; "there they lie yonder. That will deprive the fire of oxygen and give us at least a few hours before we have to vacate."

The coverings of the hatch, big, thick planks, lay not far away. Evidently they lay just as they did on the day that the cargo of mammoth tusks had been taken from the Good Hope and hidden. Working with feverish energy, the boys soon had the hatch covered tightly. But the work had almost exhausted their strength. The fumes of the blazing hold and the suffocating black smoke that rolled out, had almost caused them to succumb.

Their desperate task accomplished, they lay panting on the deck, incapable, for the time being, of further effort. However, with the hatch in place and tightly dovetailed, there was a gleam of hope that the flames might be smothered, or at least held in check till the fog cleared and they could sight a vessel.

The first faint glimmering of dawn, shown by an increasing transparence in the fog, found the derelict still lying inert. But a second later the boys were on their feet with a cheer. A light breeze had sprung up and the fog was agitated by it like drifting steam. Little by little the breeze increased and the fog thinned out to mere wisps. The sun shone through and disclosed a glimmering expanse of sea stretched all about. But, to their bitter disappointment, the great heaving expanse was empty of life. Not a sail or a sign of a steamer marred its lonely surface.

They exchanged dismayed looks. There was no knowing at what moment the fiery, seething furnace beneath their very feet might break through and force them to fight for their existence.

Already the decks were hot. Aside from this, however, so well did the hatch fit that not even a wisp of smoke escaped. Except the extreme heat, there was nothing to indicate that the interior of the Good Hope's hull was a fiery furnace.

The hours wore on, the little company of castaways dreading every moment that what they feared might happen. Still no indication that the fire was about to break through occurred. But their sufferings from thirst were terrible. One after another the Boy Scouts sank to the decks in a sort of coma. Rob, Merritt, and the ensign himself alone retained their strength.

"If some vessel doesn't appear before long we are doomed."

It was Rob who spoke, and the mere fact that the others were silent indicated plainly that they shared his opinion.

Despite their sufferings and anxiety a bright lookout was kept. It was Rob who electrified them by a sudden shout: