This is a scarce and beautiful 1878 map of the city of Cambridge Massachusetts by W. A. Mason and Sons. Centered on Harvard College, cover Cambridge north of the Charles River extending from Fresh Pond to what is today Gilmore Bridge (Prison Point Bridge at the time). The map is color-coded according to wards and notes radical distances from City Hall. Incredibly detailed, parks, streets, important buildings, ponds, and railroads are also noted. Shows the proposed extensions in the east.This map was prepared by W. A. Mason and Sons. Copyrighted by W. A. Greenough in 1877, this is the 1878 edition published by Greenough and Company. We only know of two editions of this map ever issued – the first in 1878 and the second in 1881. Furthermore, only two known examples of this particular 1878 edition are known, one with Harvard College Library and the other with the University of Massachusetts, Amherst, making this a scarce find.