O. M. Carter to Thomas Lincoln Casey, June 8, 1889 O. M. Carter to Thomas Lincoln Casey, June 9, 1889 Obelisk - calculations for weight, etc., undated Office of Building for State War and Navy Departments - Washington Monument Payment Refunds, November 7, 1887 Office of the Light House Board to Thomas Lincoln Casey, February 28, 1888 Office of the Light-House Board to Thomas Lincoln Casey, April 13, 1888 Office of the Light-House Board to Thomas Lincoln Casey, April 19, 1889 Office of the Light-House Board to Thomas Lincoln Casey, April 28, 1888 Office of the Light-House Board to Thomas Lincoln Casey, February 10, 1888 Office of the Light-house Board to Thomas Lincoln Casey, February 20, 1889 Office of the Light-House Board to Thomas Lincoln Casey, January 10, 1889 Office of the Light-House Board to Thomas Lincoln Casey, January 26, 1888 Office of the Light-House Board to Thomas Lincoln Casey, January 3, 1888 Office of the Light-House Board to Thomas Lincoln Casey, January 30, 1889 Office of the Light-House Board to Thomas Lincoln Casey, June 5, 1888 Office of the Light-house Board to Thomas Lincoln Casey, March 1, 1889 Office of the Light-house Board to Thomas Lincoln Casey, March 15, 1889 Office of the Light-House Board to Thomas Lincoln Casey, March 17, 1888 Office of the Light-House Board to Thomas Lincoln Casey, March 31, 1888 Office of the Light-House Board to Thomas Lincoln Casey, May 10, 1888 Office of the Light-House Board to Thomas Lincoln Casey, May 29, 1888 Office of the National Wire Mattress Co. to Thomas Lincoln Casey, July 16, 1895 Office of the Public Printer to Thomas Lincoln Casey, July 2, 1895 Memoranda of Plumbing on outside of Monument, October 22, 1880 Memoranda of Weight on East and West Sides of Monument Slab, undated Memorandum "Estimate of Cost of Refans to" undated Memorandum "of persons on duty in the East wing of the State, War & Navy building," March 26, 1880 Memorandum - Dimensions of Rock excavation and concrete in Foundation, undated Memorandum - Exhibiting the average rate per diem in wages of stone cutter at Monument from course #470 to 500 feet, July 21, 1884 Memorandum - Level of Top of Corners, undated Memorandum about Concrete Beams, October 20, 1879 Memorandum about Hunton, July 19/20, [1881] Memorandum about monthly work on Public Buildings & Grounds, undated [1878] Memorandum about [illegible] of Monument Commission, undated Memorandum concerning Elevator Engine and its velocity + power, undated Memorandum Concerning Frame Work, undated Memorandum concerning Lightning Rods, undated Memorandum concerning the Monumental Column to be Erected at Yorktown, Virginia, July 15, 1880 Memorandum for Lt. Kurtz, undated Memorandum from H. K. Thurber & Co., May 18, 1872 Memorandum from Thomas Lincoln Casey, December 30, 1886 Memorandum funds, 1878-1879 Memorandum of Cost of Lamp Posts, undated Memorandum of dyke of basin, undated [1878] Memorandum of Enclosures from Thomas Lincoln Casey, December 31, 1886 Memorandum of Enclosures to Thomas Lincoln Casey, December 31, 1886 Memorandum of Estimate of Cost of Monument, undated Memorandum of Estimated Cost of Marble, undated Memorandum of expenditures of lighting, undated [1878] Memorandum of Expenses on Washington Monument, undated