Sudbury Department, Sudbury Aqueduct, Rosemary Siphon Gatehouse, machine with brushes on tracks in front, Wellesley, Mass., ca. 1890-1899

Sudbury Department, Sudbury Aqueduct, Rosemary Siphon Gatehouse, machine with brushes on tracks in front, Wellesley, Mass., ca. 1890-1899

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