Dumbies Dam TUL W NS945875 1 393 45m
Dumbies Dam 1866 OS 6 inch 1st edn.
The first element is probably a personal name or nickname. The dam in question is shown as a small body of water on OS 1 inch 7th Series (1960), but as a patch of boggy ground on OS Explorer (2001).
This place-name appeared in printed volume 1