Railway bridge across the Poltross Burn, north of milecastle 48 (Thirlwall) - Source of Reference
The information on this website is based on a range of published and unpublished works. Below is a list of the source of information used in writing this record.
1) List of Buildings of Special Architectural or Historic Interest, District of Tynedale: Thirlwall 27-Jul-1987 (94)
1a) Whittle, G, 1979. The Newcastle and Carlisle Railway