In compliance with the act of Congress passed on the 23d of May, 1850, providing, among other things, for taking the Seventh Census, a superintendent was appointed and all other measures adopted which were deemed necessary to insure the prompt and faithful performance of that duty. The appropriation already made will, it is believed, be sufficient to defray the whole expense of the work, but further legislation may be necessary in regard to the compensation of some of the marshals of the Territories. It will also be proper to make provision by law at an early day for the publication of such abstracts of the returns as the public interests may require. The unprecedented growth of our territories on the Pacific in wealth and population and the consequent increase of their social and commercial relations with the Atlantic States seem to render it the duty of the Government to use all its constitutional power to improve the means of intercourse with them. The importance of opening "a line of communication, the best and most expeditious of which the nature of the country will admit," between the Valley of the Mississippi and the Pacific was brought to your notice by my predecessor in his annual message; and as the reasons which he presented in favor of the measure still exist in full force, I beg leave to call your attention to them and to repeat the recommendations then made by him. The uncertainty which exists in regard to the validity of land titles in California is a subject which demands your early consideration. Large bodies of land in that State are claimed under grants said to have been made by authority of the Spanish and Mexican Governments. Many of these have not been perfected, others have been revoked, and some are believed to be fraudulent. But until they shall have been judicially investigated they will continue to retard the settlement and improvement of the country. I therefore respectfully recommend that provision be made by law for the appointment of commissioners to examine all such claims with a view to their final adjustment.