The nature of this branch of the public service makes it necessary to commit portions of the expenses incurred in it to Executive discretion; but it is desirable that such portions should be as small as possible. The purity and permanent success of our political institutions depend in a great measure upon definite appropriations and a rigid adherence to the enactments of the Legislature disposing of public money. My desire is to have the subject placed upon a more simple and precise, but not less liberal, footing than it stands on at present, so far as that may be found practicable. An opinion that the salaries allowed by law to our agents abroad are in many cases inadequate is very general, and it is reasonable to suppose that this impression has not been without its influence in the construction of the laws by which those salaries are fixed. There are certainly motives which it is difficult to resist to an increased expense on the part of some of our functionaries abroad greatly beyond that which would be required at home. Should Congress be of opinion that any alteration for the better can be made, either in the rate of salaries now allowed or in the rank and gradation of our diplomatic agents, or both, the present would be a fit occasion for a revision of the whole subject. ANDREW JACKSON. _To the Senate and House of Representatives of the United States_. GENTLEMEN: I transmit herewith the annual report of the inspectors of the penitentiary in the District of Columbia, and beg leave to recommend the propriety of providing by law a reasonable compensation for the service of those officers. The act of Congress under which they were commissioned, though it imposes upon them important duties, in the performance of which much time and labor are necessary, is silent as to the compensation which they ought to receive. ANDREW JACKSON. _February 1, 1830_. _February 5, 1830_. _To the Senate of the United States_: I herewith communicate to the Senate a letter from the Secretary of War, with the papers which accompany it, in answer to the resolution of the Senate of the 2d February, requesting "so much of a report received from the officer of the United States Army who had command of the detachment for the protection of the caravan of traders to Santa Fe of New Mexico during the last summer as may be proper to be made public and material to be known, devising further means for the security of the inland trade between Missouri and Mexico." ANDREW JACKSON. _February 12, 1830_. _The Speaker of the House of Representatives_: I forward to the House of Representatives, for the information and decision of Congress, a communication to me from the Secretary of War on the subject of the continuation of the Cumberland road.