99. Why was the eastern end of Hadrian’s Wall at Wallsend?

This is more difficult to answer than for Bowness, as the lowest bridging point of the Tyne has always been Newcastle, whilst the lowest ford has traditionally been thought to be Newburn, some way upstream. It is possible (but not very likely) that the Romans discovered the river could be forded below the lowest bridging point.

Further reading: Breeze and Dobson 2000; Breeze 2006