Abstract: Papers of Harry Dankoler, 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.