See GenUKi for Walkhampton information and links, in particular the Dartmoor Press pages which contain a wealth of information on the area and the very inter-related families who farmed in the area (although the latter seem to have disappeared, you may find them in an archived web page search?).
The G and L links above take you to Google earth or Live Search (Virtual Earth) maps in the middle of the village. Zoom in using satellite or aerial view for close-ups.
The picture below is of the Church, a little way out of the town.