This solution they boiled down and the residuum was saltpeter or gunpowder, without which no settlement in Kentucky could exist.
The little valley now became a scene of great activity.

The fires were always burning and sack after sack of gunpowder was laid safely away in a dry place.

Henry and Paul worked hard with the others, but they never passed the crypt containing the mummies, without a little shudder.

In some of the intervals of rest they explored portions of the cave, although they were very cautious.

It was well that they were so as one day Henry stopped abruptly with a little gasp of terror.