Two days later Welton returned to the mill. At his suggestion Bob stayed with the drive. He took his place quietly as a visitor, had the good sense to be unobtrusive, and so was tolerated by the men. That is to say, he sat at the camp fires practically unnoticed, and the rivermen talked as though he were not there. When he addressed any of them they answered him with entire good humour, but ordinarily they paid no more attention to him than they did to the trees and bushes that chanced to surround the camp.

The drive moved forward slowly. Sometimes Billy packed up every day to set forth on one of his highly adventurous drives; again camp stayed for some time in the same place. Bob amused himself tramping up and down the river, reviewing the operations. Occasionally Roaring Dick, in his capacity of river boss, accompanied the young fellow. Why, Bob could not imagine, for the alert, self-contained little riverman trudged along in almost entire silence, his keen chipmunk eyes spying restlessly on all there was to be seen. When Bob ventured a remark or comment, he answered by a grunt or a monosyllable. The grunt or the monosyllable was never sullen or hostile or contemptuous; merely indifferent. Bob learned to economize speech, and so got along well with his strange companion.

By the end of the week the drive entered a cleared farm country. The cultivation was crude and the clearing partial. Low-wooded hills dotted with stumps of the old forest alternated with willow-grown bottom-lands and dense swamps. The farmers lived for the most part in slab or log houses earthed against the winter cold. Fences were of split rails laid "snake fashion." Ploughing had to be in and out between the blackened stumps on the tops of which were piled the loose rocks picked from the soil as the share turned them up. Long, unimproved roads wandered over the hills, following roughly the section lines, but perfectly willing to turn aside through some man's field in order to avoid a steep grade or soft going. These things the rivermen saw from their stream exactly as a trainman would see them from his right-of-way. The river was the highway, and rarely was it considered worth while to climb the low bluffs out of the bottom-land through which it flowed.

In the long run it landed them in a town named Twin Falls. Here were a water-power dam and some small manufactories. Here, too, were saloons and other temptations for rivermen. Camp was made above town. In the evening the men, with but few exceptions, turned in to the sleeping tent at the usual hour. Bob was much surprised at this; but later he came to recognize it as part of a riverman's peculiar code. Until the drive should be down, he did not feel himself privileged to "blow off steam." Even the exceptions did not get so drunk they could not show up the following morning to take a share in sluicing the drive through the dam.

All but Roaring Dick. The latter did not appear at all, and was reported "drunk a-plenty" by some one who had seen him early that morning. Evidently the river boss did not "take this drive serious." His absence seemed to make no difference. The sluicing went forward methodically.

"He'll show up in a day or two," said the cook with entire indifference, when Bob inquired of him.

That evening, however, four or five of the men disappeared, and did not return. Such was the effect of an evil example on the part of the foreman. Larsen took charge. In almost unbroken series the logs shot through the sluiceways into the river below, where they were received by the jam crew and started on the next stage of their long journey to the mills. In a day the dam was passed. One of the younger men rode the last log through the sluiceway, standing upright as it darted down the chute into the eddy below. The crowd of townspeople cheered. The boy waved his hat and birled the log until the spray flew.

But hardly was camp pitched two miles below town when one of the jam crew came upstream to report a difficulty. Larsen at once made ready to accompany him down the river trail, and Bob, out of curiosity, went along, too.

"It's mossbacks," the messenger explained, "and them deadheads we been carrying along. They've rigged up a little sawmill down there, where they're cutting what the farmers haul in to 'em. And then, besides, they've planted a bunch of piles right out in the middle of the stream and boomed in their side, and they're out there with pike-poles, nailin' onto every stick of deadhead that comes along."

"Well, that's all right," said Larsen. "I guess they got a right to them as long as we ain't marked them."

"They can have their deadheads," agreed the riverman, "but their piles have jammed our drive and hung her."

"We'll break the jam," said Larsen.

Arrived at the scene of difficulty, Bob looked about him with great interest. The jam was apparently locked hard and fast against a clump of piles driven about in the centre of the stream. These had evidently been planted as the extreme outwork of a long shunting boom. Men working there could shunt into the sawmill enclosure that portion of the drive to which they could lay claim. The remainder could proceed down the open channel to the left. That was the theory. Unfortunately, this division of the river's width so congested matters that the whole drive had hung.

The jam crew were at work, but even Bob's unpractised eye saw that their task was stupendous. Even should they succeed in loosening the breast, there could be no reason to suppose the performance would not have to be repeated over and over again as the close-ranked drive came against the obstacle.

Larsen took one look, then made his way across to the other side and down to the mill. Bob followed. The little sawmill was going full blast under the handling of three men and a boy. Everything was done in the most primitive manner, by main strength, awkwardness, and old-fashioned tools.

"Who's boss?" yelled Larsen against the clang of the mill.

A slow, black-bearded man stepped forward.

"What can I do for you?" he asked.

"Our drive's hung up against your boom," yelled Larsen.

The man raised his hand and the machinery was suddenly stilled.

"So I perceive," said he.

"Your boom-piles are drove too far out in the stream."

"I don't know about that," objected the mossback.

"I do," insisted Larsen. "Nobody on earth could keep from jamming, the way you got things fixed."

"That's none of my business," said the man steadily.

"Well, we'll have to take out that fur clump of piles to get our jam broke."

"I don't know about that," repeated the man.

Larsen apparently paid no attention to this last remark, but tramped back to the jam. There he ordered a couple of men out with axes, and others with tackle. But at that moment the three men and the boy appeared. They carried three shotguns and a rifle.

"That's about enough of that," said the bearded man, quietly. "You let my property alone. I don't want any trouble with you men, but I'll blow hell out of the first man that touches those piles. I've had about enough of this riverhog monkey-work."

He looked as though he meant business, as did his companions. When the rivermen drew back, he took his position atop the disputed clump of piles, his shotgun across his knees.

The driving crew retreated ashore. Larsen was plainly uncertain.

"I tell you, boys," said he, "I'll get back to town. You wait."

"Guess I'll go along," suggested Bob, determined to miss no phase of this new species of warfare.

"What you going to do?" he asked Larsen when they were once on the trail.

"I don't know," confessed the older man, rubbing his cap. "I'm just goin' to see some lawyer, and then I'm goin' to telegraph the Company. I wish Darrell was in charge. I don't know what to do. You can't expect those boys to run a chance of gittin' a hole in 'em."

"Do you believe they'd shoot?" asked Bob.

"I believe so. It's a long chance, anyhow."

But in Twin Falls they received scant sympathy and encouragement. The place was distinctly bucolic, and as such opposed instinctively to larger mills, big millmen, lumber, lumbermen and all pertaining thereunto. They tolerated the drive because, in the first place they had to; and in the second place there was some slight profit to be made. But the rough rivermen antagonized them, and they were never averse to seeing these buccaneers of the streams in difficulties. Then, too, by chance the country lawyers Larsen consulted happened to be attorneys for the little sawmill men. Larsen tried in his blundering way to express his feeling that "nobody had a right to hang our drive." His explanations were so involved and futile that, without thinking, Bob struck in.

"Surely these men have no right to obstruct as they do. Isn't there some law against interfering with navigation?"

"The stream is not navigable," returned the lawyer curtly.

Bob's memory vouchsafed a confused recollection of something read sometime, somewhere.

"Hasn't a stream been declared navigable when logs can be driven in it?" he asked.

"Are you in charge of this drive?" the lawyer asked, turning on him sharply.

"Why--no," confessed Bob.

"Have you anything to do with this question?"

"I don't believe I have."

"Then I fail to see why I should answer your questions," said the lawyer, with finality. "As to your question," he went on to Larsen with equal coldness, "if you have any doubts as to Mr. Murdock's rights in the stream, you have the recourse of a suit at law to settle that point, and to determine the damages, if any."

Bob found himself in the............