Monday, September 12.--In accordance with our pre-arranged programme, three parties were sent out this morning in search of Mr. Everts. Smith and Trumbull were to follow the take shore until they came in sight of our last camp. Hauser and Gillette were to return on our trail through the woods, taking with them their blankets and two days' rations. General Washburn and myself were to take a southerly direction towards what we called "Brown Mountain," some twelve miles away. Smith and Trumbull returned early in the afternoon and reported having seen in the sand the tracks of a man's foot, and Smith thought that he saw several Indians, who disappeared in the woods as they approached; but Trumbull, who was with him, did not see them, and Smith says it was because he was short-sighted. For some reason they did not pursue their investigations farther, and soon returned in good order to camp. The reconnaissance made by General Washburn and myself resulted in no discovery of any trace of Everts. We traveled about eleven miles directly south, nearly to the base of Brown mountain, carefully examining the ground the whole of the way, to see if any horseshoe tracks could be discovered. We crossed no stream between the lake and the mountain, and if Mr. Everts followed the stream which we crossed on the 9th, he is south of Brown mountain, for it is evident that he did not pass westward between Brown mountain and Yellowstone lake; otherwise we would have discovered the tracks of his horse. It is now night, and Hauser and Gillette have not yet returned.