"The valleys which are situated parallel to the coast range, and those which extend eastwardly in all directions among the hills, towards the great plain of the Sacramento, are of unsurpassed fertility.
"They have a deep black alluvial soil, which has the appearance of having been deposited when they were covered with water. This idea is strengthened by the fact that the rising grounds on the borders of these valleys, and many hills of moderate elevation, have a soil precisely like that of the adjoining plains.
"This soil is so porous that it remains perfectly unbroken by gullies, notwithstanding the great quantity of water which falls in it annually during the wet season. The land in the northern part of the territory, on the Trinity and other rivers, and on the borders of Clear Lake, as far as it has been examined, is said to be remarkably fertile.
"The great valley of the Sacramento and San Joaquin has evidently been, at some remote period, the bed of a lake; and those rivers, which drain it, present the appearance of having cut their channels through the alluvial deposit after it had been formed. In fact, it is not possible that they could have been instrumental in forming the plain through which they pass. Their head-waters come from the extreme ends of the valley, north and south; and, were it not for the supply of water received from the streams which flow into them from the Sierra Nevada, their beds would be almost, if not quite, dry in the summer months. The soil is very rich, and, with a proper system of drainage and embankment, would, undoubtedly, be capable of producing any crop, except sugar-cane, now cultivated in the Atlantic States of the Union.
"There are many beautiful valleys and rich hill-sides among the foot-hills of the Sierra Nevada, which, when the profits of labor in mining shall be reduced so as to cause its application to agriculture, will probably support a large population. There is said to be a rich belt of well-timbered and watered country extending the whole length of the gold region between it and the Sierra Nevada, some twenty miles in width. There is no information sufficiently accurate respecting the eastern slope of the great snowy range to enable us to form any opinion of its general character or soil. Some of its valleys have been visited by miners, who represent them as equal to any portion of the country to the westward of it.