His arguments failed to move Langdon.  Stirred to the depth of his soul by what he had seen, and what he saw about him now, the hunter-naturalist refused to leave the blood-stained and torn-up arena in which the grizzly and the black had fought their duel.

“If I knew that I was not going to fire a single shot, I would travel five thousand miles to see this,” he said.  “It’s worth thinking about, and looking over, Bruce.  The grizzly won’t spoil.  This will—­in a few hours.  If there’s a story here we can dig out I want it.”

Again and again Langdon went over the battlefield, noting the ripped-up ground, the big spots of dark-red stain, the strips of flayed skin, and the terrible wounds on the body of the dead black.  For half an hour Bruce paid less attention to these things than he did to the carcass of the caribou.  At the end of that time he called Langdon to the edge of the clump of balsams.

“You wanted the story,” he said, “an’ I’ve got it for you, Jimmy.”

He entered the balsams and Langdon followed him.  A few steps under the cover Bruce halted and pointed to the hollow in which Thor had cached his meat.  The hollow was stained with blood.

“You was right in your guess, Jimmy,” he said.  “Our grizzly is a meat-eater.  Last night he killed a caribou out there in the meadow.  I know it was the grizzly that killed ‘im an’ not the black, because the tracks along the edge of the timber are grizzly tracks.  Come on.  I’ll show you where ’e jumped the caribou!”

He led the way back into the meadow, and pointed out where Thor had dragged down the young bull.  There were bits of flesh and a great deal of stain where he and Muskwa had feasted.

“He hid the carcass in the balsams after he had filled himself,” went on Bruce.  “This morning the black came along, smelled the meat, an’ robbed the cache.  Then back come the grizzly after his morning feed, an’ that’s what happened!  There’s yo’r story, Jimmy.”

“And—­he may come back again?” asked Langdon.

“Not on your life, he won’t!” cried Bruce.  “He wouldn’t touch that carcass ag’in if he was starving.  Just now this place is like poison to him.”

After that Bruce left Langdon to meditate alone on the field of battle while he began trailing Thor.  In the shade of the balsams Langdon wrote for a steady hour, frequently rising to establish new facts or verify others already discovered.  Meanwhile the mountaineer made his way foot by foot up the coulee.  Thor had left no blood, but where others would have seen nothing Bruce detected the signs of his passing.  When he returned to where Langdon was completing his notes, his face wore a look of satisfaction.

“He went over the mount’in,” he said briefly.

It was noon before they climbed over the volcanic quarry of rock and followed the Bighorn Highway to the point where Thor and Muskwa had watched the eagle and the sheep.  They ate their lunch here, and scanned the valley through their glasses.  Bruce was silent for a long time.  Then he lowered his telescope, and turned to Langdon.