Eddy, Robert Henry. *Map 81.2.E2.1836 Map of the water region of the county of Middlesex, exhibiting the mode of supplying Boston and | Charlestown with soft water from Spot and Mystic ponds. Boston, 1836. Size, 29 3/8 x 39 3/8 inches. Scale, 100 rods to 1 inch.
-Boston. Water supply. -Charlestown, Mass. Water supply.