Although I failed to recognize our visitors among these miserable people; it was quite evident that I was known to them. I asked “who it was that had killed the men at our store?” They at first pretended not to understand me; but seeing that they were not believed, one came forward, and in a mixture of Spanish and Indian informed me that it was the Tuolume Indians that were the criminals; while they themselves (if not the cleanest) were certainly the best Indians in the mountains. Upon being asked why they were camped in such a place--without water, they said they were at first afraid of our party and the glistening instrument that had been aimed at them; but, that when they saw we were measuring the ground, and marking the trees, they were no longer alarmed, but were afraid of the Monos, whom they said were still angry with them. I told them that it was because of their treachery and dishonesty that they had been made to suffer, and then left them in their wretchedness. Quite early in the next year (1856), the survey for the water supply was recommenced under instructions from Colonel Fremont, and, under direction of his chief engineer, Mr. J. E. Clayton, Mr. Peterson was placed in charge of the field-work. This work was executed with great care, as on its accuracy the estimates depended. They were to be made by a very eminent engineer of the Erie Canal, upon whose report, it was supposed, Wall street would be governed. Peterson engaged me as his assistant in this survey. During this season the Mann Brothers finished their trail to the Yosemite, so that it was used by visitors. Hearing that they had felled some immense trees and bridged the South Fork, Mr. Peterson had hopes to reach the valley earlier in the season by crossing the river at that place. On reaching the South Fork, where we supposed the bridge to be we found that a large tree had been felled across the stream with the design of forming the foundation of a bridge, but it had fallen so low, or so near the water on the opposite side, that a flood would be likely to sweep it away, and it had, therefore, been abandoned. This was a great disappointment to Mr. Peterson. As we could not ford the stream, we would have to go into camp or wait for the water to fall or go back, for the snow-clad ridges were impassable. While Peterson was considering the matter, I took an axe and sloped and notched the butt of the tree so that I was able to get my horse, an intelligent animal, to clamber up on the prostrate trunk; when, without difficulty, I led him safely across and landed him on the other side of the stream. We had two mules, whose natural timidity caused them to hesitate before attempting to climb the log, but their attachment for the horse, which they had seen safely cross, with some _persuasion_ effected with a stout cudgel counteracted their fears, and they too were safely led over.