Part 1 (Green Bay Mss 15): Original Collection,
Physical Description: 1.6 cubic feet (4 archives boxes) 
Scope and Content Note: Papers, 1865-1947, of a Wisconsin author and newspaper publisher. Correspondence, reports, agreements, financial accounts, stockholders' information, and photographs relating to copper mining and the Leighton-Wyoming Mining Company, 1906-1911, in which Dankoler invested, comprise the bulk of the collection. There is also material, 1935-1939, concerning construction of the Door County museum at Sturgeon Bay which Dankoler helped found. Other correspondence pertains to Dankoler's work, particularly the writing he did for the Manufacturer's Appraisal Company of Cleveland and Philadelphia.

Correspondence, 1865, 1901, 1907-1910, 1912, 1916-1919, 1920-1925, 1930, 1932-1940

Door County Museum

History of building

Antone Thompson, first settler, Sturgeon Bay

Memoranda and notes, Dankoler controversy

Write-up on Russian Egor Lazareff

Articles and poems

Leighton-Wyoming Mining Company

Correspondence

1905-1907

1908-1910

1911-1916, 1918-1920, 1922, 1929-1932

History of the company

Inventories, reports to stockholders

Accounts at mine

1910-1911

1906-1909

Agreements, certificates, etc.

Records of stock

Maps, diary, and photographs

Minutes, 1906-1912

Office expense at Milwaukee, 1909-1919

Stock sales and accounts, 1906-1911

Part 2 (M93-142): Additions,
Physical Description: 0.2 cubic feet (1 archives box) 
Scope and Content Note: Damkoehler family history, circa 1715-1987, including biographical sketches, Civil War letters written by Ernst Damkoehler and clippings about him, a family history and genealogical chart, and a photograph of the Oconto County Boarding House, Barn, and Mill Crew (Oconto, Wisconsin).

Part 3 (PH 2101): Additions,
Physical Description: 41 photographs (1 folder) 
Scope and Content Note: Photographs created by Dankoler showing properties of the Leighton-Wyoming Mining Company, the Ferris-Haggerty Mining Company, and adjoining areas near Battle Lake and Encampment, Carbon County, Wyoming, circa 1907-1910.

Part 4 (PH 2153): Additions,
Physical Description: 5 photographs and 1 map (1 folder) 
Scope and Content Note: Captioned photographs and a small map giving directions to Sylvan Lodge, home of Harry Dankoler near Sturgeon Bay, Wisconsin, circa 1920.

Part 5 (PH 2939): Additions,
Physical Description: 68 photographs 
Scope and Content Note: Photographs created and collected by Dankoler, primarily of family affairs and activities in Sturgeon Bay, Wisconsin, circa 1898-1909.

Part 6 (PH 2916): Additions,
Alternate Format: Electronic reproductions of all of these negatives are available through Wisconsin Historical Images.

Physical Description: 12 negatives (1 box) 
Scope and Content Note: Negatives created by Dankoler to produce illustrations for fiction published in a magazine he edited. The images are studio portraits, often intended to be cut out and mounted against appropriate backgrounds.

Part 7 (WHi(D28)): Additions,
Physical Description: 173 negatives 
Scope and Content Note: Original glass plate negatives created by Dankoler of activities in Sturgeon Bay, Wisconsin, circa 1898-1909.