Sir: R. N. Boston (Letters, 11 April) is 90 per cent correct in his geography. Hadrian's Wall runs through, rather than south of, Northumberland. Luckily it runs south of Ponteland and I am happy to be in the Scottish bit if a political split is achieved, as I find the Scottish sense of morality and community preferable to the London alternative. So Hadrian's Wall it is then.
J. M. BROWN