In 1680, two towns from Massachusetts'colonial-era Norfolk County, Haverhill and Salisbury, both located north of the Merrimack River, were annexed to Essex County, while Norfolk County's remaining four towns were transferred to the Province of New Hampshire.
In 1680, two towns from Massachusetts'colonial-era Norfolk County, Haverhill and Salisbury, both located north of the Merrimack River, were annexed to Essex County. The former Norfolk County's remaining four towns, which included Exeter and what is now Portsmouth, were transferred to the Province of New Hampshire.