Calculations and Estimates: South Wing, undated

Calculations and estimates: Stock & Cutting in S W & N Building, undated

Calculations and Estimates: Stone Cutting [Memorandum], undated

Calculations and estimates: Stone papers, 1882

Calculations and Estimates: Thomas Lincoln Casey to Robert T. Lincoln, April, 7, 1883

Calculations and estimates: West Wing, undated

Calculations and estimates: When we took charge March 3, 1877, undated

Calculations and estimates: When we took charge of Building March 3, 1877…, undated

Calculations and Estimates: [Envelope], undated

Calculations and estimates: [Memorandum] concerning fire places Navy Building, undated

Calculations and estimates: [Memorandum] Cost of Plastering 3d Coat North, undated

Calculations and estimates: [Memorandum] Estimate for Water Main, undated

Calculations and estimates: [Memorandum] Estimate of Cost of heating apparatus Navy Building, undated

Calculations and estimates: [Memorandum] Estimate of Cost of Stones Stairs of War Building, undated

Calculations and estimates: [Memorandum] of Parties to furnish bricks, undated

Calculations [of water levels and amounts at Great Falls (GF) and Distributing Reservoir (DR)?], undated

Calculations, etc, of Prices of Stonecutting, 1877

Calhoun Latham to Thomas Lincoln Casey, December 27, 1888

Camelia C. J. Dyer to Thomas Lincoln Casey, January 15, 1884

Capt. Charles Carr to Thomas Lincoln Casey, January 24, 1891

Capt. Crowninshield to Thomas Lincoln Casey, August 6, 1885

Ed. Sutherland to Thomas Lincoln Casey, July 5, 1887

Ed. Sutherland to Thomas Lincoln Casey, July 7, 1887

Ed. Sutherland to Thomas Lincoln Casey, June 11, 1888

Ed. Sutherland to Thomas Lincoln Casey, June 15, 1887

Ed. Sutherland to Thomas Lincoln Casey, June 16, 1887

Ed. Sutherland to Thomas Lincoln Casey, June 2, 1888

Ed. Sutherland to Thomas Lincoln Casey, June 22, 1888

Ed. Sutherland to Thomas Lincoln Casey, June 7, 1888

Ed. Sutherland to Thomas Lincoln Casey, March 2, 1888

Ed. Sutherland to Thomas Lincoln Casey, March 9, 1888

Ed. Sutherland to Thomas Lincoln Casey, May 10, 1888

Ed. Sutherland to Thomas Lincoln Casey, May 11, 1888

Ed. Sutherland to Thomas Lincoln Casey, May 12, 1888

Ed. Sutherland to Thomas Lincoln Casey, May 14, 1887

Ed. Sutherland to Thomas Lincoln Casey, May 14, 1888

Ed. Sutherland to Thomas Lincoln Casey, May 17, 1888

Ed. Sutherland to Thomas Lincoln Casey, May 18, 1888

Ed. Sutherland to Thomas Lincoln Casey, May 19, 1888

Ed. Sutherland to Thomas Lincoln Casey, May 21, 1888

Ed. Sutherland to Thomas Lincoln Casey, May 22, 1888

Ed. Sutherland to Thomas Lincoln Casey, May 23, 1888

Ed. Sutherland to Thomas Lincoln Casey, May 24, 1888

Ed. Sutherland to Thomas Lincoln Casey, May 25, 1888

Ed. Sutherland to Thomas Lincoln Casey, May 26, 1888

Ed. Sutherland to Thomas Lincoln Casey, May 28, 1888

Ed. Sutherland to Thomas Lincoln Casey, May 29, 1888

Ed. Sutherland to Thomas Lincoln Casey, May 3, 1888

Ed. Sutherland to Thomas Lincoln Casey, May 5, 1888

Ed. Sutherland to Thomas Lincoln Casey, May 7, 1888