Otto Elster 1852–1922 Source: Wikimedia Commons About Otto Elster German military historian and author (1852-1922) People from the Same Era Alfred Milner, 1st Viscount Milner 1854–1925 diplomat, journalist, politician Giessen Eleanor Mildred Sidgwick 1845–1936 college head, mathematician, teacher Whittingehame James Frederick Porter 1855–1919 mining engineer Karol Lanckoroński 1848–1933 archaeologist, art collector, art historian, patron of the arts, politician, preservationist Vienna Vitoriano da Rosa Martins 1843–1921 businessperson, politician Castelo Branco Frederik Jan Louis Krämer 1850–1928 historian, university teacher Dordrecht