W. C. H. to Thomas Lincoln Casey, undated [October 1877]

W. C. M. Euen to Thomas Lincoln Casey, February 22, 1885

W. C. [Endicott] to Thomas Lincoln Casey, undated

W. Church to Thomas Lincoln Casey, April 7, 1885

W. D. Chipley to Capt. P. M. Price, March 18, 1890

W. D. Whitney to Professor [John F.] Weir, October 12, 1892

W. Dennison to Thomas Lincoln Casey, May 2, 1878

W. E. Bailey to Thomas Lincoln Casey, July 16, 1888

W. E. Bailey to Thomas Lincoln Casey, July 8, 1889

W. E. Benjamin to Thomas Lincoln Casey, October 13, 1892

W. E. Merrill to Thomas Lincoln Casey, April 25, 1890

W. E. Niblack to Thomas Lincoln Casey, April 5, 1890

W. E. Niblack to Thomas Lincoln Casey, December 28, 1885

W. E. Niblack to Thomas Lincoln Casey, March 28, 1890

W. E. Niblack to Thomas Lincoln Casey, May 3, 1890

W. Emory to Thomas Lincoln Casey, January 25, 1896

W. F. Smith to Thomas Lincoln Casey, January 17, 1885

W. G. Gallant to Mr. Harvey, December 30, 1869

W. H. Armstrong to Thomas Lincoln Casey, February 5, 1885

W. H. Bailey to Thomas Lincoln Casey, June 19, 1877

W. H. Bixby to Thomas Lincoln Casey, August 12, 1890

W. H. Bixby to Thomas Lincoln Casey, August 26, 1890

W. H. Bixby to Thomas Lincoln Casey, September 2, 1890

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

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

William P. Craighill to Major [Henry M.] Adams, June 26, 1891

William P. Craighill to Thomas Lincoln Casey, copy, November 7, 1892

William P. Craighill to Thomas Lincoln Casey, February 20, 1885

William P. Craighill to Thomas Lincoln Casey, July 2, 1891

William P. Craighill to Thomas Lincoln Casey, July 20, 1885

William P. Craighill to Thomas Lincoln Casey, July 9, 1891

William P. Craighill to Thomas Lincoln Casey, May 22, 1891; Bixby to Craighill, May 21, 1891

William P. Duvall to Thomas Lincoln Casey, June 15, 1885

William P. Frye to Thomas Lincoln Casey, February 28, 1891, telegram

William P. Frye to Thomas Lincoln Casey, March 28, 1888

William Palmer Hopkins to Thomas Lincoln Casey, June 22, 1885

William Palmer Hopkins to Thomas Lincoln Casey, June 28, 1885

William R. Babcock to Thomas Lincoln Casey, February 4, 1885

William R. Babcock to Thomas Lincoln Casey, October 1, 1884

William R. Davis to Thomas Lincoln Casey, undated [1877]

William Richardson to Thomas Lincoln Casey, April 7, 1885

William Rossell to Thomas Lincoln Casey, October 27, 1891

William Tindall to Thomas Lincoln Casey, February 3, 1885 (1)

William Tindall to Thomas Lincoln Casey, February 3, 1885 (2)

William Tindall to Thomas Lincoln Casey, February 4, 1885

William Whelan to Thomas Lincoln Casey, October 16, 1869

William [Tecumseh] Sherman to the Keeper - Washington Aquaduct, May 22, 1878, telegram

Willliam Cabell to Thomas Lincoln Casey, February 18, 1885

Wilson Vance and [Augustus] Watson to Thomas Lincoln Casey, June 12, 1879

Wimer to Dr. Barnard, November 29, 1877