It has been divided into several current cities and towns, including Nashua, Hollis, Hudson, Litchfield, and Merrimack.
The original tract of land was bisected by the Merrimack River, an important route for the lucrative fur and log trade.
Both the northern New Hampshire half and the southern Massachusetts half prospered, and various villages were formed along the Merrimack, but also along Salmon Brook, the Nashua River, Pennichuck Brook, and the Souhegan River, which also ran through the tract.
Over the years, other towns were formed from parts of the original area on both sides of the state line, and in 1836 the remaining part that still bore the name of "Dunstable, New Hampshire" was renamed "Nashua", after the name of the river that flowed into the Merrimack at the location then referred to as "Indian Head".
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