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One of two surviving tidal mills (no longer powered by tide) in the Boston metropolitan area, the Slade Spice Mill is the fourth rebuilding on this site of the first mill constructed here around 1734. Initially used for grist milling, the mill became Henry Slade's tobacco and snuff mill after 1837 and the D. & L. Slade Spice Company, the earliest spice-producing company in the country, by the 1870s. The current clap-boarded, three-story, long and narrow hipped-roofed building is divided into a grinding area over the water and a storage area closer to the shore. A milldam extended from the southwest corner of the building. In 2004, Fondren McGrath rehabilitated the mill for housing.