Mill Creek

In the novel Dead Man's Folly, Mill Creek is a river near Nassecombe and Nasse House. The cottage rented by Alec and Sally Legge rented is located by the creek.

Nasse House is based on Agatha Christie's  own house Greenway near Dartmouth. There is no creek on the Greenway side of the river nearly. However there is an "Old Mill Creek" on the other side of the river just north of Dartmouth. There is also an "Old Mill Cottage" at the head of the creek. It is likely that Christie used  place names inspired by the local geography.