Roman Cumbria to Wallsend on the Tyne estuary, with additional military installations running down the Cumbrian coast from Bowness to Risehow, south of Maryport, in an integrated fashion (and with forts at Burrow Walls and Moresby that were perhaps not part of the system). Historians believe that the Turf Wall from the River Irthing to Bowness-on Solway was rebuilt in stone in two stages. The most easterly five miles were rebuilt at the time of Hadrian, with the remainder being rebuilt after 150 AD. However, this is open to dispute: it is uncertain whether the building works in the second half of
Solway Firth by fire in 1960. On 9 March 1876 a French 79 ton Lugger called the St. Pierre was stranded and finally declared lost on Blackshaw Bank, an ill-defined feature which extends for a considerable distance on both sides of the channel of the River Nith. Between 1869 and 1921, the estuary was crossed by the Solway Junction Railway on a 1780 m (5850 ft) iron viaduct (Edgar and Sinton, 1990). The line was built to carry iron ore from the Whitehaven area to Lanarkshire and was financed and operated by the Caledonian Railway of Scotland. The railway was not a