To cause said posts in his discretion to be visited by detachments of troops stationed on the western frontier, to suppress through said posts the sale of munitions of war to the Indian tribes in case of hostilities, and annually to lay before Congress, at its general session, full returns, verified by the oaths of the several superintendents, of the several acts by them performed and of the condition of said posts, with the income and expenditures growing out of the same respectively. Section 4.--And be it further enacted, that the said superintendents shall be appointed by the President by and with the advice and consent of the Senate for the term of four years, with a salary of two hundred dollars payable out of any moneys in the treasury not otherwise appropriated; that they shall respectively take an oath before the District Judge of the United States for the Western District of Missouri, faithfully to discharge the duties imposed on them in and by the provisions of this act, and give a bond to the President of the United States and to his successors in office and assigns, and with sufficient security to be approved by the said judge in at least the penalty of twenty-five thousand dollars, to indemnify the President or his successors or assigns for any unlawful acts by them performed, or injuries committed by virtue of their offices, which said bonds may at any time be assigned for prosecution against the said respective superintendents and their sureties upon application to the said judge at the instance of the United States District Attorney or of any private party aggrieved. Section 5.--And be it further enacted, that it shall be the duty of said superintendents to cause the soil adjacent to said posts, in extent not exceeding 640 acres, to be cultivated in a farmer-like manner and to produce such articles of culture as in their judgment shall be deemed the most profitable and available for the maintenance of said posts, for the supply of troops and other Government agents which may from time to time resort thereto, and to render the products aforesaid adequate to defraying all the expenses of labor in and about said posts, and the salary of the said deputy superintendent, without resort to the Treasury of the United States, remitting to the Secretary of the Treasury yearly a sworn statement of the same, with the surplus moneys, if any there shall be.