In the early years, the main central building for teaching purposes encompassed the former Mansion House. It was a Colonial style building, a former sanatorium, which was utilizing the fact that sulfur water was springing naturally from the grounds near the building. The Mansion House also served as a library, which contained several hundred books for about twelve to fifteen years since the college's conception. In 1856, a new temporary three-story brick building was built housing the expanding library collection. The brick building was eventually replaced when the Elihu Slocum Library was built in 1898. Another addition to the campus was University Hall built in 1893. By the turn of the century the campus comprised a total of thirteen buildings serving the various departments.