“Upwards of five hundred husky Serbs can do a deal of work, but it didn’t take more than three days of log-rolling and rock-packing to show that--even at the pace we were hitting it--that hundred-yard-long, thirty-feet-high dam wouldn’t be finished before the next season, and that, even if we did get it done some time, the stuff we were putting in it was too loose to stop water. It was at this stage of things that I had _my_ big idea. I had worked in hydraulic mines in the West, and while we had nothing to rig up a pipe and nozzle from, there _was_ a chance to divert a little mountain torrent that came tumbling down from the snows only a few yards below our dam site. Why not, I suggested, build up only a narrow crib of boulders and pine logs to act as a barrier, and then bring over this little torrent--it was flowing about a hundred miner’s inches at this time--and let it sluice down the loose ‘conglomerate’ from the four-hundred-foot-high cliff through which it flowed? Because no one had anything else to offer, we decided to try the thing. “We used up a good half of our poor little store of powder in making the cut to bring over the stream, but the job was mostly easy digging, and we finished it in three days. My young ‘hydraulic’ sure tore down a lot of rock and gravel, but, as we couldn’t rig up anything to confine it properly, it only spread out in a big ‘fan,’ which in turn was sluiced away by the river. That fairly stumped us, and when on top of it a big storm came on and brought down a flood that washed away all our cribbing, we chucked up in disgust our project of ‘harnessing nature’ against the Austrian and began to plan raids again. “All that night it rained cats and dogs, and when I looked out of my hut the next morning the river was over its banks and humping it like a ‘locoed’ mustang. But the funny thing was that the cascade from the little stream we had diverted seemed to have disappeared. At first I thought it had bucked its way back into its old channel, but when I went down to look I found that it had been ‘swallowed’ up by the cliff. Five times as big as on the night before, it came tumbling down over an up-ended stratum of slate, to disappear in a foamy yellow-white spout into a deep crack it had sluiced into the soft ‘conglomerate.’ At the bottom of the cliff it came boiling out from under the angling slate-layer in a stream that looked to be about equal parts of gravel and water. My baby ‘hydraulic’ had evidently undermined a sloping section of the cliff for a hundred feet or more, and only the tough slate stratum was staving off a big cave-in. How big a cave-in it was going to be, and what it was going to lead to, I never guessed.