Posts on the Rio Grande frontier. Letter from the Secretary of War, transmitting copies of correspondence, &c., relative to the expenditure of the appropriation made by the act of April 16, 1880, "For Acquiring Sites and the Erection of Suitable Posts for the Protection of the Rio Grande Frontier," in response to resolution of the House of Representatives of January 12, 1882. January 20, 1882. -- Referred to the Committee on Appropriations and ordered to be printed