"Wal," said old Joe, "he most certainly come back into the fort with a dog. I was there and seen him."

Leff snickered, even the doctor's voice showed the incredulous note when he asked:

"Where could it have come from?"

The tall man shrugged.

"Don't ask me. All I know is that Jim Cockrell swore to it and I've heard him tell it drunk and sober and always the same way. He held out for the angel. I'm not saying anything against that, but whatever it was it must have had a pretty powerful pull to get a dog out to a trapper in the dead o' winter."

They wondered over the story, offering explanations, and as they talked the fire died low and the moon, a hemisphere clean-halved as though sliced by a sword, rose serene from a cloud bank. Its coming silenced them and for a space they watched the headlands of the solemn landscape blackening against the sky, and the river breaking into silvery disquiet. Separating the current, which girdled it with a sparkling belt, was the dark blue of an island, thick plumed with trees, a black and mysterious oblong. Old Joe pointed to it with his pipe.

"Brady's Island," he said. "Ask Hy to tell you about that. He knew Brady."

The tall man looked thoughtfully at the crested shape.

"That's it," he said. "That's where Brady was murdered."

And then he told the story:

"It was quite a while back in the 30's, and the free trappers and mountain men brought their pelts down in bull boats and mackinaws to St. Louis. There were a bunch of men workin' down the river and when they got to Brady's Island, that's out there in the stream, the water was so shallow the boats wouldn't float, so they camped on the island. Brady was one of 'em, a cross-tempered man, and he and another feller'd been pick-in' at each other day by day since leavin' the mountains. They'd got so they couldn't get on at all. Men do that sometimes on the trail, get to hate the sight and sound of each other. You can't tell why.

"One day the others went after buffalo and left Brady and the man that hated him alone on the island. When the hunters come home at night Brady was dead by the camp fire, shot through the head and lyin' stiff in his blood. The other one had a slick story to tell how Brady cleanin' his gun, discharged it by accident and the bullet struck up and killed him. They didn't believe it, but it weren't their business. So they buried Brady there on the island and the next day each man shouldered his pack and struck out to foot it to the Missouri.

"It was somethin' of a walk and the ones that couldn't keep up the stride fell behind. They was all strung out along the river bank and some of 'em turned off for ways they thought was shorter, and first thing you know the party was scattered, and the man that hated Brady was left alone, lopin' along on a side trail that slanted across the prairie to the country of the Loup Fork Pawnees.

"That was the last they saw of him and it was a long time - news traveled slow on the plains in them days - before anybody heard of him for he never come to St. Louis to tell. Some weeks later a party of trappers passin' near the Pawnee villages on the Loup Fork was hailed by some Indians and told they had a paleface sick in the chief's tent. The trappers went there and in the tent found a white man, clear headed, but dyin' fast.