All this is somewhat necessary to show with what sudden and violent agitation Thor caught a certain warm, close smell as he came around the end of a mass of huge boulders.  He stopped, turned his head, and swore in his low, growling way.  Six feet away from him, grovelling flat in a patch of white sand, wriggling and shaking for all the world like a half-frightened puppy that had not yet made up its mind whether it had met a friend or an enemy, was a lone bear cub.  It was not more than three months old—­altogether too young to be away from its mother; and it had a sharp little tan face and a white spot on its baby breast which marked it as a member of the black bear family, and not a grizzly.

The cub was trying as hard as it could to say, “I am lost, strayed, or stolen; I’m hungry, and I’ve got a porcupine quill in my foot,” but in spite of that, with another ominous growl, Thor began to look about the rocks for the mother.  She was not in sight, and neither could he smell her, two facts which turned his great head again toward the cub.

Muskwa—­an Indian would have called the cub that—­had crawled a foot or two nearer on his little belly.  He greeted Thor’s second inspection with a genial wriggling which carried him forward another half foot, and a low warning rumbled in Thor’s chest.  “Don’t come any nearer,” it said plainly enough, “or I’ll keel you over!”

Muskwa understood.  He lay as if dead, his nose and paws and belly flat on the sand, and Thor looked about him again.  When his eyes returned to Muskwa, the cub was within three feet of him, squirming flat in the sand and whimpering softly.  Thor lifted his right paw four inches from the ground.  “Another inch and I’ll give you a welt!” he growled.

Muskwa wriggled and trembled; he licked his lips with his tiny red tongue, half in fear and half pleading for mercy, and in spite of Thor’s lifted paw he wormed his way another six inches nearer.

There was a sort of rattle instead of a growl in Thor’s throat.  His heavy hand fell to the sand.  A third time he looked about and sniffed the air; he growled again.  Any crusty old bachelor would have understood that growl.  “Now where the devil is the kid’s mother!” it said.

Something happened then.  Muskwa had crept close to Thor’s wounded leg.  He rose up, and his nose caught the scent of the raw wound.  Gently his tongue touched it.  It was like velvet—­that tongue.  It was wonderfully pleasant to feel, and Thor stood there for many moments, making neither movement nor sound while the cub licked his wound.  Then he lowered his great head.  He sniffed the soft little ball of friendship that had come to him.  Muskwa whined in a motherless way.  Thor growled, but more softly now.  It was no longer a threat.  The heat of his great tongue fell once on the cub’s face.

“Come on!” he said, and resumed his journey into the north.

And close at his heels followed the motherless little tan-faced cub.