_August 20th, Sunday_.--The past week has been in many respects an eventful one. On Friday, while several of us were rambling about the neighbourhood of the camp, exploring the numerous mountain canones which lie between us and the Sierra Nevada, we found, among the loose particles of rock which had crumbled away from the sides of the ravine and fallen to the bottom, several lumps of gold of a much larger size than any we had before met with. This induced us to examine the upper part of the ravine, where promising traces of gold were readily detected; further examination convinced us that the precious metal existed here in far greater quantises than in the locality where we had been at work for several weeks previous; and we were, moreover, satisfied that it was to be obtained with much less difficulty, as, being found in solid lumps, the unpleasant labour of washing was dispensed with. We therefore determined, on the following morning, to remove all our implements to this spot, the only disadvantage of which was its being situated rather far off from our place of encampment. Since our friends, the Indians, had quitted us, we had always left some one or other on guard at the shanty, to keep watch over our horses and baggage, both during the day time and at night; for we knew that some of them were continually prowling about, our horses having frequently shown signs of uneasiness in the night time. During the day there was generally one member of the party who remained at the shanty, having either José or the lad Horry in company. The ravine we proposed moving to was nearly half-a-mile distant. After breakfast, Bradley, Lacosse, and McPhail, accompanied by the old trapper, set off on a hunting expedition, for our stock of provisions was now getting very low, leaving José and our legal friend at the camp. The remainder of the party, including myself, proceeded to the ravine with our implements, and after working a few hours we succeeded in procuring more gold than we had obtained in any two days during the past week. We were just on the point of returning to the camp to dinner when Dowling, who was standing near some sage bushes at the upper part of the ravine, heard a rustling among them, and on moving in the direction of the noise saw an Indian stealthily creeping along, who, as soon as he perceived he was discovered, discharged an arrow, which just missed its mark, but lacerated, and that rather severely, Dowling's ear. The savage immediately set up a most terrific whoop, and ran off, but stumbled before he could draw another arrow from his quiver, while Dowling, rushing forward, buried his mattock in the head of his fallen foe, killing him instantaneously.