Biographical/historical: Harry A. Williamson, a member of the brotherhood of Freemasonry, was a prolific writer on the subject of Freemasonry and a diligent record collector of the history of African-American Freemasonry. In 1904 Williamson joined the brotherhood of Freemasonry, and was initiated, passed and raised in Mount Olive Lodge in Manhattan. In his later years, Williamson became a member of the Grand Lodge of New York (Prince Hall). He held more elected and appointed positions in the Grand Lodge than any other member of its history. Throughout his life, Williamson was an honorary member of numerous lodges and a member of a number of United States and foreign societies.
Williamson's professional work included a brief career in the paper manufacturing business. Williamson also worked in other occupations, and passed examinations for both the New York State Board of Chiropody and the United States Postal Service. He eventually chose a career with the United States Postal Service, where he remained until his retirement in 1940.
