Letter, 27 Mar. 1838, to Hugh Swinton Legare, re congressional controversy over location, design, and material used in the U.S. Treasury fire-proof building in Washington, D.C.; letter, 9 Aug. 1838, Washington, D.C., to Benjamin Ogle Taylor, re Taylor's aid in securing a bank loan for mantel pieces in the new U.S. Treasury building.

Perhaps most interesting is the range of buildings and machines that Mills designed - from monuments and local courthouses, to prisons and churches, bridges and canals, to rotary piston engines and fireproof masonry vaults - all during a revolutionary era of building technology in America.".

Research paper providing evidence to support the rumored involvement of Robert Mills (1781-1855) in the architectural design of the South Caroliniana Library at the University of South Carolina in Columbia, South Carolina.