Professor S. Newcomb to Thomas Lincoln Casey, undated [May 1878]

Professor Spencer Baird to Thomas Lincoln Casey, June 14, 1883

Professor William H. Burr to Thomas Lincoln Casey, January 15, 1896

Professor William H. Burr to Thomas Lincoln Casey, March 15, 1896

Professor William H. Burr to Thomas Lincoln Casey, March 9, 1896

Project of Expenditure or $500,000 appropriation asked for year 1885-6, February 4, 1885

Projections of loss of head by street and various pipe sizes, undated

Proposals for Stone, Sand, Cement and Iron, May 19, 1887

Proposed Government Printing Office, August 11, 1894, copy

Provisional program recommended for the Centennial Commemoration of the first authorized settlement in the territory of the northwest, 1887

Quantities of Stone, S. Wing, July 21 - 77, No. 9, July 21, 1877

Quincy A. Gillmore to Hon. S. Y. Tupper, January 22, 1885, circular

Quinn to Thomas Lincoln Casey, August 8, 1889, telegram

R. B. Bowler to the Auditor for the State and other Departments, October 5, 1894, copy (1)

R. B. Bowler to the Auditor for the State and other Departments, October 5, 1894, copy (2)

R. B. Jones to Thomas Lincoln Casey, January 17, 1891

R. B. Thomas to Thomas Lincoln Casey, July 12, 1888

R. C. Drum to Thomas Lincoln Casey, December 28, 1885

R. C. Drum to Thomas Lincoln Casey, July 23, 1888

R. C. Drum to Thomas Lincoln Casey, March 13, 1885, circular

R. C. Drum to Thomas Lincoln Casey, March 5, 1887, telegram

R. C. Drum to Thomas Lincoln Casey, November 22, 1888

R. C. Park to President Benjamin Harrison, April 9, 1891

R. C. Parsons to Thomas Lincoln Casey, November 6, 1889

R. C. Winthrop to Thomas Lincoln Casey, February 16, 1885

R. D. Mussey to Thomas Lincoln Casey, April 6, 1885

R. D. Mussey to Thomas Lincoln Casey, October 2, 1888

R. H. Humphreys regarding: F. Harwood, undated

R. H. Humphreys to Thomas Lincoln Casey, June 30, 1885

R. H. Tilley to Thomas Lincoln Casey, April 22, 1891

R. H. Tilley to Thomas Lincoln Casey, August 9, 1883

R. H. Tilley to Thomas Lincoln Casey, December 12, 1890

R. H. Tilley to Thomas Lincoln Casey, December 12, 1891

R. H. Tilley to Thomas Lincoln Casey, December 16, 1892

R. H. Tilley to Thomas Lincoln Casey, February 12, 1884

R. H. Tilley to Thomas Lincoln Casey, February 17, 1885

R. H. Tilley to Thomas Lincoln Casey, January 14, 1891

R. H. Tilley to Thomas Lincoln Casey, July 17, 1883

R. H. Tilley to Thomas Lincoln Casey, June 4, 1884

R. H. Tilley to Thomas Lincoln Casey, March 26, 1884

R. H. Tilley to Thomas Lincoln Casey, March 31, 1891

R. H. Tilley to Thomas Lincoln Casey, March 6, 1885

R. H. Tilley to Thomas Lincoln Casey, March 6, 1896

R. H. Tilley to Thomas Lincoln Casey, November 20, 1884

R. H. Tilley to Thomas Lincoln Casey, November 4, 1891

R. H. Tilley to Thomas Lincoln Casey, November 4, 1892

R. H. [Illegible] to Thomas Lincoln Casey, January 19, 1891

R. J. Meigs to Thomas Lincoln Casey, October 3, 1884

R. J. Wynne for the Secretary of the Treasury to Thomas Lincoln Casey, November 14, 1892

R. J.[?] Chew to Thomas Lincoln Casey, October 12, 1869