In 1872, Still published an account of the Underground Railroad, "The Underground Railroad Records", based on the carefully recorded secret notes he had kept in diaries during those years. His book includes his impressions of station masters such as Thomas Garrett, Daniel Gibbons and Abigail Goodwin. It went through three editions and in 1876 was displayed at the Philadelphia Centennial Exhibition. Historians have since used it to understand how the Underground Railroad worked; both Project Gutenberg and the Internet archive make the text freely available.