Folks,
Much to the mapmaker's dismay, he will need to take out the Central Massachusetts lake. The state discussed building the Quabbin Reservoir in the 1880's to meet Boston's need for water, but they didn't follow through with the plan until the late 1920's.
http://www.mwra.state.ma.us/04water/html/hist5.htm
Regards,
Gary Heverly