behind AotW

Major Walker was Assistant Adjutant General to General Darius Couch (First Division, Fourth Army Corps) in Maryland in 1862 and later with the Second Army Corps to 1865.

He had quite a post-War career, being twice Superintendent of the US Census (1870, 1880), professor at Yale (’72-’79) and the third president of the Massachusetts Institute of Technology (MIT, 1881-1897).