Taking advantage of last weekend's free access to FindMyPast, I found an entry in the weekly War Office casualty for January 1919, in which Grandad Walter is listed. This proves that he was indeed wounded, as suspected, probably during the Battle of the Sambre.
It usually took quite a while for such events to appear in the casualty lists, so it's not always easy to pinpoint the actual date of occurrence, but once again Pte. Henry Atcherley, whose records we have already used to help date Grandad's war service, comes to our assistance as he is also listed.
Atcherley's pension and medical records still exist, which show that he was wounded by shrapnel around the 7th or 8th November 1918, during the aforementioned battle. Considering that shrapnel was later found in Grandad's leg, it's reasonable to assume that he was similarly wounded at that time.
I've updated Grandad's entry accordingly.
