“That was Lupo the Wolf,” Farnum explained rapidly, his voice betraying his excitement. “You can guess what that means?”

The others nodded, with compressed lips.

“I want you to trail them. Don’t run into danger, but see if their camp is nearby.”

With nods of understanding, the two frontiersmen were off at the run, not crossing the open camp, but circling it amongst the trees. Then Farnum turned to Mr. Hampton, and the boys crowding at his heels.

“That wasn’t just an attack from Indian thieves,” he said. “Mr. Hampton”—and his voice took on a solemn tone—“that was a blow from the enemy.”

“What do you mean?”

“They were desperadoes under the personal leadership of Lupo the Wolf.”

“And he?”

“He is a cross-breed, half Indian, half white, and the most notorious bad man in the north. He is known not only throughout the length and breadth of Alaska, but throughout the Yukon of Canada, too. From Ketchikan to Arctic City, and from Nome to Dawson, he has gambled, fought, knifed, murdered, and never been brought to book. Ah, you consider Alaska is law-abiding these days. To a certain extent, the towns and mining camps have grown more orderly and there are sheriffs ‘north of 54.’ But might still rules in the camps.”

Farnum spoke bitterly, and leaned a moment on his rifle. As it was evident, however, that he had not yet finished, the others did not interrupt. Presently he resumed.