Thus encouraged, and laughing to himself, Henry put on another spurt, and while Dave was still four yards from the big rock came up alongside as before.

"Now ye have it!" roared Barringford. "Keep the pace, both on ye! The feller to lose gits walloped, an' the winner gits the King's Cross an' a purse of a thousand pounds! Tech the rock fair an' squar', or I'll call the race off!" And Barringford slapped his thigh in high glee. To see such a contest took him back to his boyhood days, and he half wished he was in the race himself.

Both reached the rock at precisely the same time, and rested heavily on it for a second, so that Barringford might see that it was really and truly "teched," as he expressed it. It was somewhat over their heads, and in the water at their feet they could feel the sprawling roots of the tree behind it.

Then, exactly how it happened would be hard to tell, but without warning the great rock suddenly slipped from the river bank and went into the water with a loud splash, carrying the two swimmers down under it!

Barringford saw the catastrophe and for the instant he stood spellbound. It was as if the light of day had suddenly given way to the darkness of night. Both of his young friends were gone, carried to the bottom by that huge rock which had seemed such a safe point for the turn in the race.

The old frontiersman waited a few seconds—to him they seemed an eternity—and then, as neither Henry nor Dave reappeared, he plunged hastily into the river and swam in their direction with all his might and main. He was a good swimmer, and now desperation lent strength to his muscles.

He was in midstream when he saw a head bob up, and an instant later he recognized Henry. The youth was panting for breath.

"Henry!" he called out. "Henry! Whar is Dave!"

"I—I—don't know!" came with a gulp and a gasp. "That rock was—was almost the de—death of me!"

"Dave must be under it!" groaned the old frontiersman. "We must help him, or he'll be drowned!"