The Days of a Man 



1889 



Yellow- 

 stone 

 River 



Two 



Ocean 



Pass 



to Lupine Creek. As to Lava itself, we were in- 

 formed that a similar connection existed higher up 

 between that and Black-tail Deer Creek. 



But the crucial test of the problem concerned the 

 Yellowstone River, a glorious stream well stocked 

 with Cutthroat both above and below its superb 

 falls, the one of no, the other of 310 feet. The 

 probable explanation of this anomaly had been 

 previously indicated by the results of early official 

 topographic explorations, but lack of time then 

 prevented our making any attempt at verification 

 by following the river to its headwaters outside the 

 park. In 1891, however, the whole matter was 

 definitely cleared up by Evermann, who made a 

 special trip with that end in view. 



Out of Two Ocean Pass, a flat meadow in the 

 plateau of the same name on the Continental Divide, 

 flow Atlantic and Pacific creeks, both well stocked 

 with trout and permanently connected by a cross 

 stream; the former runs northeastward to the 

 Yellowstone, the latter southwestward to the Snake, 

 the main tributary of the Columbia. These facts 

 explain why trout are found in the Yellowstone above 

 falls which no fish could possibly surmount also 

 why they are identical with the Cutthroat, the 

 common species of the Columbia and all its tribu- 

 taries. As for their presence in the Yellowstone 

 below the falls, and in the rest of the upper Missouri 

 drainage as well, we have no absolute data. It is, 

 however, not impossible that trout or trout eggs 

 may at times pass over falls unscathed. It is possi- 

 ble, also, that other Two Ocean waters will be found 

 when our mountains are adequately examined. 



In South America two large-scale examples of 



C 340 3 



