The marshy swamp that edged the western reaches of the back bay and would become known as Fenway as it appeared in 1838.  Development was sparse at that time, with what would become the Longwood medical area, one of the leading centers of healthcare in the world a damp patch of undeveloped woods.  Interesting details as to how this watery area was first used to collect tidewater to  power mills is all explained, as is the reasons for the filling in of the area, and the creation of the parks that ring the area now.  The map is 36X24 and in full color.   In a departure from my usual methods, I marked the spot where Fenway Park will be built.

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High Resolution cross section