As it is ascertained that mines of gold, silver, copper, and quicksilver exist in New Mexico and California, and that nearly all the lands where they are found belong to the United States, it is deemed important to the public interest that provision be made for a geological and mineralogical examination of these regions. Measures should be adopted to preserve the mineral lands, especially such as contain the precious metals, for the use of the United States, or, if brought into market, to separate them from the farming lands and dispose of them in such manner as to secure a large return of money to the Treasury and at the same time to lead to the development of their wealth by individual proprietors and purchasers. To do this it will be necessary to provide for an immediate survey and location of the lots. If Congress should deem it proper to dispose of the mineral lands, they should be sold in small quantities and at a fixed minimum price. I recommend that surveyors-general's offices be authorized to be established in New Mexico and California and provision made for surveying and bringing the public lands into market at the earliest practicable period. In disposing of these lands, I recommend that the right of preemption be secured and liberal grants made to the early emigrants who have settled or may settle upon them. It will be important to extend our revenue laws over these territories, and especially over California, at an early period. There is already a considerable commerce with California, and until ports of entry shall be established and collectors appointed no revenue can be received. If these and other necessary and proper measures be adopted for the development of the wealth and resources of New Mexico and California and regular Territorial governments be established over them, such will probably be the rapid enlargement of our commerce and navigation and such the addition to the national wealth that the present generation may live to witness the controlling commercial and monetary power of the world transferred from London and other European emporiums to the city of New York.