[Illustration: "The lanterns of the working gang
glancing here and there like fire-flies.">[

"If the bank will only hold until morning!" said Mr. Manton, about midnight, as he and Billy Brackett entered the Venture's cosey "shanty" for a brief rest. All but these two and Solon were asleep, laying in a stock of strength for the labors of the next day.

Suddenly there came a frightened shouting from the bank. Then all other sounds were drowned in the furious roar of rushing waters, while the raft seemed to be lifted bodily and hurled into space.

CHAPTER XXXIX.

HURLED THROUGH THE CREVASSE AND WRECKED.

During the earlier hours of that eventful night Billy Brackett had brought all his engineering skill to bear upon the problem of how to save the Moss Bank levee. His cheery presence, and the evident knowledge that he displayed, inspired all hands with confidence and a new energy. Under his direction the raftmates worked like beavers, and Mr. Manton was more hopeful that the levee could be made to withstand the terrible pressure of swollen waters than he had been from the beginning. But it was very old and had been neglected for years. By daylight the young engineer might have noted its weak spots, and strengthened them. He would have seen the thin streams that silently, but steadily and in ever-increasing volume, were working their way through the embankment near its base. In the inky blackness of the night they were unheeded; and while spade and pick were plied with unflagging zeal to strengthen the higher portions, these insidious foes were equally busy undermining its foundations.

Shortly before midnight everything seemed so secure that the boys were sent to the Venture's "shanty" to get a few hours of sleep. Then Billy Brackett and Mr. Manton came in for the hot coffee Solon was preparing for them. They had hardly seated themselves at the table when the catastrophe occurred. Without warning, a quarter of a mile of the water-soaked levee sank out of sight, and dissolved like so much wet sugar. Into the huge gap thus opened the exulting waters leaped with the rush and roar of a cataract. On the foaming crest of this tawny flood the stout timber raft was borne and whirled like an autumn leaf. A few of the working gang managed to reach it and save themselves, but others were swept away like thistle-down.