While at San Francisco I had opportunity of obtaining information respecting the companies which had been formed in the States. Not one of these, so far as I could learn, continued together; they were often dissolved before they reached the mines. And even if they held a charter, and were bound to each other under heavy liabilities, they soon fell to pieces on reaching the gold placers. One intelligent gentleman, who had enjoyed every opportunity for observation, related to me the history of the company with which he left New York. They numbered one hundred and forty-one members. One of this company made $15,000 by trading; another made $7000 in the same way. Two had made $6000; one as a tin manufacturer, the other by mining. Three had made $2000; two by mining and trading, and one by teaming. One had made $1500, and another $1000. Half the remainder made a living by mining, gambling, or trading, and the remainder have died. Before I left the mines, I applied to the secretaries or other officers of mining companies upon the Tuolumne for statements respecting their operations during the past season. These were companies extending along the river a few miles both above and below Hart’s Bar. Their operations were generally more successful than those of other damming companies, excepting, perhaps, some upon the Yuba River. I speak within bounds when I say that four out of five of the river damming operations, through the whole mines, were failures. The averages of the fourteen companies given below were generally obtained from their books. In some instances, their mining operations were continued after I left, but only in a limited degree, and, in general, were entirely suspended, and the members were scattering among the various winter diggings, or, in a few cases, seeking their distant homes. No. 1. _Sigñorita Bar Company._ Worked by Green T. Martin, of Rodney, Miss., and R. N. Wood, of Shreveport, La. Total number of days, 1354. Highest number of hands one day, 96. Commenced on the 3d of September, and left on the 25th of October. Total amount taken from bar, $9700. Highest amount in one day, 7 lbs. 4 oz. Length of dam, 290 feet. Loss by rise of river in repairs, $1400. $1000 taken out since we left. Our force was too large to be longer profitably employed. The upper part of the bar was poor, and on the west side the bed was black slate, with a deposit of three or four feet, and on the slate was found pieces of pine and other timber; and the whole had the appearance of ashes or ash-bed, the water upon it resembling soap-suds. All the specimens found contained greater or less quantities of quartz. R. N. WOOD. No. 2. _Stephens’s Bar Damming and Mining Company._ Gross amount of gold taken out this year from Stephens’s Bar Damming and Mining Company, $12,000. October 26th, took out $1224. Length of canal, 1200 yards. Number of men in the company, 38.