Joyford (General)
Walnut Tree Cottage in Joyford
based on the "walk" of the census data, its in the region of Joyford Farm / Corn Mill / Britannia Inn (aka Dog and Muffler) going up the hill to the Lonk. < so could be the one you remember>
It is not marked on the map ( as far as I can tell), however this is the area of your interest
http://www.old-maps.co.uk/
co-ords 357904,213440