Bibliography: Herringshaw, Thomas William. Herringshaw's Encyclopedia of American Biography of the Nineteenth Century, Chicago, IL:American Publishers' Association, 1902. page 70 BAKER, MARCUS, explorer, was born Sept. 23, 1849, in Ostemo, Mich. He was educated at Kalamazoo College and the University of Michigan, graduating in 1870; in 1870- 71 was made professor of mathematics in Albion college, and in 1871-73 tutor of mathematics in the university of Michigan. In 1873 he became connected with the U.S. Coast and Geodetic survey, attaining in 1886 the grade of assistant geographer. During this time he spent several years in explorations and surveys in Alaska, and traversed the entire Pacific coast from southern California to the Arctic ocean. In 1882 he was in charge of the Los Angeles magnetic observatory, established by the U.S. signal service.