General History of Cheshire County NH
GILSUM lies in the northern-central part of the county, in lat. 43° 1′ and long. 4° 50′. In outline it is similar to that of a carpenter’s square, bounded north by Alstead and Marlow, east by Stoddard and Sullivan, south by Sullivan and Keene, and west by Surry. It was originally granted, under the name …