Douglass was also wounded in the Second Battle of Fort Wagner and became ill, forcing him to be medically discharged from the army in 1864. After the Civil War, he worked as a teacher for the Freedman's Bureau. In 1866, Lewis and his brother, Frederick Douglass, Jr. went to Denver where they were hosted by Henry O. Wagoner, a friend of their father. Wagoner taught the brothers typography and along with William J. Hardin, Lewis taught reading, writing, and other subjects to adult blacks in Wagoner's home. Douglass married Helen Amelia Loguen in 1869 and moved to Washington D.C. where he became the first typesetter employed by the Government Printing Office. Douglass's employment by the Government Printing Office as typesetter did not last long because he was unable to join the typesetters' union due to racial intimidation.