This map shows the Boston area in 1775 - about the time that Washington and the Continental army were besieging the British within Boston By Sir Thomas Hyde Page in 1776.
Source: Library of Congress, Maps Division http://hdl.loc.gov/loc.gmd/g3764b.ct000070
![Boston, its environs and harbor, with the rebels works raised against that town in 1775](https://mtv-drupal-assets.s3.amazonaws.com/files/modules/boston-environs-1775-loc-web.jpg?VersionId=VJfzjN7cB7N7shK6d6DNmOSsEG.gnWHc)