What is "nutwell"

Nutwell in the parish of Woodbury on the south coast of Devon is a historic manor and the site of a Georgian neo-classical Grade II* listed mansion house known as Nutwell Court. The house is situated on the east bank of the estuary of the River Exe, on low-lying ground nearly contiguous to the water, and almost facing Powderham Castle similarly sited on the west bank. The manor was long held by the powerful Dynham family, which also held adjacent Lympstone, and was according to Risdon the site of their castle until John Dynham, 1st Baron Dynham (1433-1501), the last in the male line, converted it into "a fair and stately dwelling house".