on Physical Fitness and the subcommittee on colleges and schools of the National Committee on Physical Fitness. Henderson retired shortly after the Brown v. Board of Education decision made segregated schooling obsolete, so the position evaporated, but he was made a fellow of the American Association for Health, Physical Education and Recreation. During World War II, Henderson helped train Army recruits. In the 1940s, Henderson also advocated for civil rights, including for interracial athletic competitions. Among the battles he fought in the 1940s was picketing the Uline Arena (originally a hockey venue and later called the "Washington Coliseum"), because the Uline would not allow African Americans and Whites to compete against each other. After hearing the AAU Golden Gloves Boxing competitions were to be held at the Uline, Henderson encouraged picketing until Eugene Meyer, publisher of The Washington Post, withdraw his support for holding the event there. Efforts by Henderson and Meyer ultimately led to the AAU allowing integrated boxing in the District of Columbia. Henderson wrote several seminal books about African American participation in sports, including his landmark work, The Negro In Sports (Washington, DC: Associated Publishers, Inc., 1939). In 1910–1913, Henderson co-authored an annual handbook published by the Spalding sports company, entitled, Official Handbook of the Interscholastic Athletic Association of Middle Atlantic States, which chronicled the birth of organized sports among African Americans along the Eastern seaboard. This publication, which included photographs of African American teams that competed against each other, was the first of its kind. Henderson also contributed regularly through the National Negro Press Association, including such pioneering magazines as The Messenger and Crisis. In 1963 he collaborated with Sports magazine to publish "The Black Athlete—Emergence and Arrival" as part of their International Library of Negro Life and History. His last contribution, sponsored by the Phelps-Stokes Fund, was entitled "The Black American in Sports". Beyond athletics, Henderson and his wife, Nellie Henderson, also an educator, fought against segregation discrimination in housing and education. Five years after they moved to Virginia, in 1915, the Falls Church town council passed an ordinance to create segregated districts within the town. Dr. Henderson, Joseph Tinner and seven other community members, formed the Colored Citizens Protective League, and started a letter writing campaign to address the council and this ordinance. Dr. Henderson and his wife, Mary Ellen, were members of the NAACP, in Washington, D.C., so, they also wrote a letter