Otto Ehrenfried Ehlers (31 January 1855 – 3 October 1895) was a German traveller who is known for his account of a long trip through inland Southeast Asia, documented in his 1894 book Im Sattel durch Indochina, and republished in 2002 by White Lotus Press of Thailand in English as a three-part series entitled On Horseback Through Indochina.[1]