Thornton is on a raft in a river when it jerked and thornton was flung off.''The boat flirted over and snubbed in to the bank bottom up,while thornton,flung sheer out of it,was carried down stream,towards the worst part of the rapids, a strech of wild water in which no swimmer could live.''
As John Thornton was washed down the river, he was able to hang on to a rock.''He clutched its slippery top with both hands.''
Buck is attached to a rope so that when he goes to try to save john Thornton he isn't carried by the river to.
After saving John Thornton,but buck is bruised in the the attempt to save John Thornton from swimming in the rough water.
Thornton decides to camp until buck recovers from his bruises and is able to travel again.
Buck recovers from his bruises and is able to travel again so they head back to camp