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Base Printing Plant. A.E.F., Langres, France [viewbook] (1918)
Couts, John C. United States. National Guard [military record], Grammar School Certificate, and two photographs (1912-1917)
Harkness, Daniel D. Diary (1899-1900)
Harkness, Daniel D. Diary [1901-1902]
Harkness, Daniel D. Diary (1910)
[Harkness, Daniel D.] letter to Oscar N. Land (1899, Aug. 20)
Harkness, Daniel D. miscellaneous certification cards (1923-1928)
Harkness, Daniel D. miscellaneous ephemera from Langres, France (1918-1919)
Harkness, Daniel D. United States. Army. Expeditionary Forces [military records] (1919)
Harkness, Daniel D. United States Army. Infantry Regiment 34th. Company E. [military records] (1901-1926)
Harkness, Daniel D. United States Army. Volunteer Cavalry, 1st. Company E. [military records] (1898)
Harkness, Daniel D. United States. Department of Agriculture [government records] (1907-1909)
"Mrs. Hubbs" letter to Daniel D. Harkness (1922, Oct. 24)
Land, Oscar N. United States. War Department [military record] (1940)
Ledwidge, Thomas P. letter to Daniel D. Harkness (1928, May 30)
Los Angeles (Calif.) Engineer Department (1924)
Roosevelt's Rough Riders reunion (1928)
United States. Army. Volunteer Cavalry, 1st [ephemera] (1899-1971)
Smith, Langdon, 1858-1909. Evolution [poem] [1906]
Postcards [undated]
[Harkness, Daniel D. in New Mexico?] [photographs] [1898]
Harkness, Daniel D. [photographs] (1899-1918)
Hawaii and Philippines [photographs] (1899)
Lake Arrowhead (Calif.) [photographs] [1922]
[Men and women at a camp site] [photographs] [undated]
[New Mexico] [photographs] [1898]
[At sea] [photographs] [1899]
United States. Forest Service in Arkansas (1910)
Roll: 604th Engineer Company D, C, and F Washington Barracks, D.C. [photograph] (1917, Aug.)