Wolstytree

Blitterlees is a small hamlet in the parish of Holme Low, one mile south of Silloth in Cumbria, United Kingdom. The hamlet of Wolsty is located approximately 1 mile (1.6 km) to the south as the crow flies, or 2.25 miles (3.62 km) by road, and Cumbria's county town, Carlisle, is located 23 miles (37 km) to the east.

Milefortlet 13 was a Milefortlet of the Roman Cumbrian Coast defences. These milefortlets and intervening stone watchtowers extended from the western end of Hadrian's Wall, along the Cumbrian coast and were linked by a wooden palisade. They were contemporary with defensive structures on Hadrian's Wall.

Silloth Battery Extension railway station was the terminus of the Blitterlees Branch, which turned southwards off the Carlisle and Silloth Bay Railway's Silloth Branch a short distance east of Silloth station. The larger railway ran from Carlisle, England. The Bitterlees Branch does not appear on standard railway maps, but it is clear on OS maps, though the station is not identifiable as such.

Milefortlet 12 (Blitterlees) was a Milefortlet of the Roman Cumbrian Coast defences. These milefortlets and intervening stone watchtowers extended from the western end of Hadrian's Wall, along the Cumbrian coast and were linked by a wooden palisade. They were contemporary with defensive structures on Hadrian's Wall.