"It will be perceived that this is a subject of very great importance, not only to the people of California, but to the United States, and calls for prompt and efficient action on the part of the Government. It is believed that the appointment of competent commissioners, fully empowered to investigate these titles, in a spirit of kindness towards the claimants, with power to confirm such titles as justice may seem to demand, or with instructions to report their proceedings and awards to Congress, for confirmation or rejection, will be the best and perhaps the only satisfactory mode of adjusting this complex and difficult question." He also makes the following observations and recommendations concerning the extent and value of the land, to which the title of the government is unquestionable, and the best mode of improving it. "The lands in the northern part of the Territory, above the 39°, have not been explored or granted. They are supposed to embrace an area of about twenty millions of acres, a large portion of which is doubtless valuable for its timber and soil. "Comparatively few grants have been obtained in the great valley of the Sacramento and San Joaquin. "This vast tract, therefore, containing, as is estimated, from twelve to fifteen millions of acres, belongs mostly to the Government. South of this valley, and west of the Colorado, within the limits of California, as indicated in her Constitution, there are said to be extensive tracts of valuable, unappropriated land; and, on investigation, it will probably appear that there are many of them in detached bodies, which have not been granted. "I do not speak of the gold region, embracing the entire foot-hills of the Sierra Nevada, some five hundred miles long and sixty miles broad, in connection with the public domain, which may be embraced in the general land system for sale and settlement, for reasons which will be hereafter assigned. "The survey of the public lands on a system suited to the interests of the country is a matter of very great importance. In the inhabited portions of the Territory, the boundaries of Mexican grants, running as they do in all directions, will render the system of surveys by parallels of latitude and longitude quite impracticable. "In all parts of the country, irrigation is desirable, and its benefits should be secured, as far as possible, by suitable surveys and legal regulations. Most of the valleys are watered by streams sufficiently large to be rendered very useful. It would, therefore, seem wise to lay off the land in conformity to the course of the hills and streams which bound and drain the valleys.