The initial point on the Rio Grande has also been fixed by the commissioners, at latitude 32 degrees 22', and at the date of the last communication the survey of the line had been made thence westward about 150 miles to the neighborhood of the copper mines. The commission on our part was at first organized on a scale which experience proved to be unwieldy and attended with unnecessary expense. Orders have therefore been issued for the reduction of the number of persons employed within the smallest limits consistent with the safety of those engaged in the service and the prompt and efficient execution of their important duties. Returns have been received from all the officers engaged in taking the census in the States and Territories except California. The superintendent employed to make the enumeration in that State has not yet made his full report, from causes, as he alleges, beyond his control. This failure is much to be regretted, as it has prevented the Secretary of the Interior from making the decennial apportionment of Representatives among the States, as required by the act approved May 23, 1850. It is hoped, however, that the returns will soon be received, and no time will then be lost in making the necessary apportionment and in transmitting the certificates required by law. The Superintendent of the Seventh Census is diligently employed, under the direction of the Secretary of the Interior, in classifying and arranging in tabular form all the statistical information derived from the returns of the marshals, and it is believed that when the work shall be completed it will exhibit a more perfect view of the population, wealth, occupations, and social condition of a great country than has ever been presented to the world. The value of such a work as the basis of enlightened legislation can hardly be overestimated, and I earnestly hope that Congress will lose no time in making the appropriations necessary to complete the classifications and to publish the results in a style worthy of the subject and of our national character.