I also beg leave to call your attention to the propriety of extending at an early day our system of land laws, with such modifications as may be necessary, over the State of California and the Territories of Utah and New Mexico. The mineral lands of California will, of course, form an exception to any general system which may be adopted. Various methods of disposing of them have been suggested. I was at first inclined to favor the system of leasing, as it seemed to promise the largest revenue to the Government and to afford the best security against monopolies; but further reflection and our experience in leasing the lead mines and selling lands upon credit have brought my mind to the conclusion that there would be great difficulty in collecting the rents, and that the relation of debtor and creditor between the citizens and the Government would be attended with many mischievous consequences. I therefore recommend that instead of retaining the mineral lands under the permanent control of the Government they be divided into small parcels and sold, under such restrictions as to quantity and time as will insure the best price and guard most effectually against combinations of capitalists to obtain monopolies. The annexation of Texas and the acquisition of California and New Mexico have given increased importance to our Indian relations. The various tribes brought under our jurisdiction by these enlargements of our boundaries are estimated to embrace a population of 124,000. Texas and New Mexico are surrounded by powerful tribes of Indians, who are a source of constant terror and annoyance to the inhabitants. Separating into small predatory bands, and always mounted, they overrun the country, devastating farms, destroying crops, driving off whole herds of cattle, and occasionally murdering the inhabitants or carrying them into captivity. The great roads leading into the country are infested with them, whereby traveling is rendered extremely dangerous and immigration is almost entirely arrested. The Mexican frontier, which by the eleventh article of the treaty of Guadalupe Hidalgo we are bound to protect against the Indians within our border, is exposed to these incursions equally with our own. The military force stationed in that country, although forming a large proportion of the Army, is represented as entirely inadequate to our own protection and the fulfillment of our treaty stipulations with Mexico. The principal deficiency is in cavalry, and I recommend that Congress should, at as early a period as practicable, provide for the raising of one or more regiments of mounted men. For further suggestions on this subject and others connected with our domestic interests and the defense of our frontier, I refer you to the reports of the Secretary of the Interior and of the Secretary of War.