After the beginning of the seige of Boston, Henry Pelham, the half brother of John Singleton Copley, prepared this map, entitled "A PLAN of BOSTON in New England and its Environs." It not only shows the fortifications that would force the Briitsh evacuation of Boston on March 17, 1776. It also allows a modern student of Boston to visualize several essential features of the eighteenth century geography of Boston. Boston was settled upon a fish-shaped peninsula connected to the mainland by a narrow "neck" (Boston is labeled in the center of this map); it was nested in an extensive harbor that allowed easy access to the Atlantic ocean; it's harbor was scatterd with islands that provided strong defenses against invasion by sea; and finally, Boston lies at the center of towns that were spread in an arc around it (from lower left to upper right): Milton, Dorchester, Roxbury, Brooklin, Cambridge, Medford, and Charlestown. Henry Pelham's map has been described as "This was the best printed plan of the city of Boston and its environs, to date." Here is
a scalable version of this map from the Norman B. Leventhal Map Center, at the Boston Public Library.