A warning scream from the girls was unheard by either of the struggling men.

A dozen lumberjacks leaped to the cap-log to go to the assistance of Tom and Hippy, who they knew were in great peril.
"Come back! Boys, come back! You can't help them now," cried Grace in an agony of apprehension.
"The fools! Why don't they run ?" raged Joe Shafto, and the pet bear growled in sympathy with her at the unusual sounds.
It was a terrifying moment for those who could do no more than stand helplessly watching.

The jacks by this time were well out on the cap-log, with Willy Horse in the lead and red-headed Spike close at his heels.

They were suddenly halted by a report that sounded like an explosion of heavy artillery.
An advance log, rushing straight towards the gates, swerved when within a few feet of them, and, rearing half its dripping length, hurled itself against the gate-lever at which Hippy and Tom were tugging.
Both saw the giant rise from the boiling flood.
"Too late! Save your--" Tom did not finish.

Hippy and Tom at that instant were catapulted into the air, hurled by the gate-lever, and fell into the river below the dam with a splash.
Without an instant's hesitation, Willy Horse, followed by Spike, leaped to the rescue, knowing well that only a few seconds lay between them and the cataract of logs that was about to tumble over into the Little Big Branch below the dam.
The rest of the jacks hesitated only for an instant, then they too leaped into the river and made their way towards Tom and Hippy, both of whom were unconscious.