William Lawrence to Thomas Lincoln Casey, November 29, 1884

William Ludlow to Thomas Lincoln Casey, December 12, 1892

William Ludlow to Thomas Lincoln Casey, December 16, 1884

William Ludlow to Thomas Lincoln Casey, July 31, 1888

William Ludlow to Thomas Lincoln Casey, November 6, 1892

William M. Evarts to Thomas Lincoln Casey, July 15, 1879

William McLean to Thomas Lincoln Casey, November 12, 1869

William N. Sweet to Thomas Lincoln Casey, December 19, 1892

William N. Sweet to Thomas Lincoln Casey, December 3, 1883

William N. Sweet to Thomas Lincoln Casey, November 18, 1892

William P. Craighill to Capt. [Thomas] Turtle, June 22, 1891

W. Scott West to Thomas Lincoln Casey, February 19, 1890

W. Sherman to Thomas Lincoln Casey, May 28, 1885

W. Smith to Thomas Lincoln Casey, November 21, 1891

W. Smith to Thomas Lincoln Casey, October 9, 1891

W. W. Corcoran to Hon John S. Barber, February 1, 1887, copy

W. W. Gelatt to Barnard, April 9, 1878

W. W. Gelatt to Thomas Lincoln Casey, undated [1879]

W. W. Gellatt to Thomas Lincoln Casey, November 9, 1877

W. W. Gellatt to Thomas Lincoln Casey, October 31, 1877

W. Whitelock to Thomas Lincoln Casey, May 1, 1885

W. Whitelock to Thomas Lincoln Casey, May 18, 1885

W. Whitelock to Thomas Lincoln Casey, May 5, 1885

W. Whitelock to Thomas Lincoln Casey, May 9, 1885

W. Winthorpe to Thomas Lincoln Casey, undated [1877]

W. Winthrop to Thomas Lincoln Casey, August 2, 1869

W. Young to Thomas Lincoln Casey, March 27, 1890

Wade Hampton to Thomas Lincoln Casey, September 11, 1888

Walter D. Weir to Thomas Lincoln Casey, August 3, 1869

Walter D. Weir to Thomas Lincoln Casey, December 11, 1869

Walter D. Weir to Thomas Lincoln Casey, July 15, 1869

Walter L. Fisk to Thomas Lincoln Casey, November 10, 1891

Walter L. Fisk to Thomas Lincoln Casey, October 15, 1891

Walter McFarland to Thomas Lincoln Casey, February 17, 1887

Walter McFarland to Thomas Lincoln Casey, July 9, 1888

Walter McFarland to Thomas Lincoln Casey, March 21, 1887

Walter McFarland to Thomas Lincoln Casey, May 14, 1887

Walter S. Franklin to Thomas Lincoln Casey, July 16, 1888

Walter West to Thomas Lincoln Casey, June 7, 1869

War Department Library to Thomas Lincoln Casey, May 13, 1891

War Department to Bernard R. Green, undated [August 1885]

War Department to Thomas Lincoln Casey, September 12, 1885

War Department to [Thomas Lincoln Casey], April 14, 1888

Warren Ackerman to [Frederick] T. Frelinghuysen, May 19, 1884

Warren Ackerman to [Frederick] T. Frelinghuysen, May 19, 1884, copy

Washington Aqueduct Tables, July 1881

Washington Aqueduct, Flow of Water for different levels, undated

Washington Aqueduct: Discharge of Conduit between the two reservoirs..., March 3, 1882

Washington Aqueduct: Flow of Water in Conduit from Gt Falls to the Distributing Reservoir, February 25, 1882

Washington Aqueduct: Flow of Water in Conduit, undated