Document
South Petherton
Observation stations outside the boundaries of the landmass are indicated by red dots within pencil circles., These stations were used,to plot prominent features of an area being mapped -,such as church spires - in order to construct a grid., A red line thus -..-..-..- indicates the boundary between counties Somerset and Dorset., On the back of the manuscript is a note confirming T Budgen as draughtsman.
The British Library1807