Mazes and Marvels of Wind Cave
E.C. Horn was a travel writer of the late 19th and early 20th centuries. His booklet, Mazes and Marvels of Wind Cave (1901), along with Luella Agnes Owen's Cave Regions of the Ozarks and Black Hills (1898) were the first books published about Wind Cave. These books, in conjunction with Alvin McDonald's diary, The Private Account of A.F. McDonald, provide the earliest accounts of Wind Cave.