mK) THE CARIBOO TRAIL found his wealth by going still lower on the watercourse to a vertical depth of eighty feet. For seven miles along William’s Creek worked four thousand men. Cariboo Cameron took a hundred and fifty thousand out of his claim in three months. In six months of ’63 William’s Creek yielded a million and a half dollars, and this was only one of many rich creeks. From ’59 to ’71 came twenty-five million dollars in gold from the Cariboo coun- try. By ’65 hydraulic machinery was coming in and the prospectors were flocking out; but to this day the Cariboo mines have remained afreakish gamble. Mines for which capitalists have paid hundreds of thousands have sud- denly ended in barren rock. Diggings from which nuggets worth five hundred dollars have been taken have petered out after a few hun- dred feet. Even where the gravel merged to whitish gold quartz, the most expert engineer in the camp could not tell when the vein would fault and cease as entirely as if cut off. And the explanation of this is entirely theoretical. The theory is that the place of the gold was the gravel bed of an old stream, an old stream antedating the petrified forests of the South- west, and that, when vast alluvial deposits were carried over a great part of the conti-