Received this original B&M map of Cape Ann, Massachusetts (a small peninsula off the Atlantic Ocean on Boston's "North Shore" - about 3/4 of the way between Boston and the New Hampshire/Maine border) as a holiday gift.
Shows the branch lines serving Swampscott and Marblehead in the south; Gloucester and Rockport towards the east; Ipswich to the north; and several towns in between.
These were maybe lines originally of the Eastern Railroad which B&M acquired in the late 1880's. The map says it was issued by the B&M passenger department and is not dated, but my guess is turn of the century.