He was vastly contented, and something told him that Thor would not leave the meat.

Ten minutes later Thor verified his judgment by returning.

In his huge jaws he caught the caribou at the back of the neck.
Then he swung himself partly sidewise and began dragging the carcass toward the timber as a dog might have dragged a ten-pound slab of bacon.
The young bull probably weighed four hundred pounds.

Had he weighed eight hundred, or even a thousand, Thor would still have dragged him--but had the carcass weighed that much he would have turned straight around and _backed_ with his load.
In the edge of the balsams Thor had already found a hollow in the ground.
He thrust the carcass into this hollow, and while Muskwa watched with a great and growing interest, he proceeded to cover it over with dry needles, sticks, a rotting tree butt, and a log.

He did not rear himself up and leave his "mark" on a tree as a warning to other bears.