‘Blighty Valley’ was the name given by the Army to the lower part of the deep valley running south westwards through Authuille Wood to join the river between Authuille and Aveluy.  For some time it was an important (though inevitably a dangerous) route.  The upper part of the valley was called ‘Nab Valley’.  Blighty Valley Cemetery is almost at the mouth of the valley, a little way up its northern bank.