Halfdan Olaus Christophersen

Halfdan Olaus Christophersen (13 December 1902 – 27 May 1980) was a Norwegian historian, literature researcher and non-fiction writer.
He was born at Drammen in Buskerud, Norway. His doctorate thesis at Wadham College, Oxford was a treatment of John Locke (1932). During the occupation of Norway by Nazi Germany he was a central member of the Norwegian resistance movement. From late 1944 he lived undercover as an active member of Hjemmefrontens Ledelse. After World War II, he served as director of the Department of Information Science and Media Studies at the University of Bergen (1946-1954).
He was editor of the three volumes of Den store krigen, published from 1946 to 1949. Among his other works are biographies of Marcus Jacob Monrad, Eilert Sundt and Niels Treschow. He wrote several books on the history of travelling and tourism, and World War II memoirs Fra nød til seir.