"On our right decision much of the fate of the expedition depends; since if, after ascending to the Rocky Mountains or beyond them, we should find that the river we were following did not come near the Columbia, and be obliged to return, we should not only be losing the traveling season, two months of which have already elapsed, but probably dishearten the men so much as to induce them either to abandon the enterprise, or yield us a cold obedience, instead of the warm and zealous support which they have hitherto afforded us.... The fatigues of the last few days have occasioned some falling off in the appearance of the men; who, not having been able to wear their moccasins, have had their feet much bruised and mangled in passing over the stones and rough ground. They are, however, perfectly cheerful, and have an undiminished ardor for the expedition." In order to settle the doubt, the officers took each one branch of the stream and proceeded to explore it for some distance above the confluence, to determine its direction. Captain Lewis, ascending the northern fork, became convinced that it was not the main stream; and to it he gave the name, which it still bears, of Maria's River. His warmth of youth speaks in this paragraph: "I determined to give it a name and in honour of Miss Maria W--d [Maria Wood, his cousin] called it Maria's River. It is true that the hue of the waters of this turbulent and troubled stream but illy comport with the pure celestial virtues and amiable qualifications of that lovely fair one; but on the other hand it is a noble river; one destined to become in my opinion an object of contention between the two great powers of America and Great Britin, with rispect to the adjustment of the North westwardly boundary of the former; and that it will become one of the most interesting branches of the Missouri." Meanwhile, Captain Clark had gone far enough along the southern fork to satisfy himself that that was the proper course; and when he rejoined Captain Lewis at the confluence, preparations were made for continuing the journey. It was then clear that the burdens of the men must be lightened; accordingly, considerable quantities of merchandise, ammunition, etc., were buried in the earth, or "cached," after a method often followed by travelers of the West; care being taken to preserve the stores against moisture. One of the periogues also was left at this place, securely hidden. While this work was going on, Captain Lewis, with several of the men, proceeded to explore the southern stream more minutely, seeking to devise means for passing the canyon at the mouth of which the party was encamped. June 13th he heard in the distance the roar of the Great Falls of the Missouri; and, after pushing on for several miles, he stood at the foot of the lower cascade. Relying upon descriptions which had been given by the Indians at the Mandan villages, he now felt assured that the right way had been chosen.