From FreeBMD it looks like Uncle Bill died in Bedford in Sept 1972 aged 76. I've been puzzling about where William and Sarah's youngest daughter born 1926 that Grizel mentioned here #207 was on September 29th when the 1939 registration was carried out. I looked at possible references in the Register and there are a couple for girls aged about 13/14 that indicate she could have been on a school residential trip of some kind or possibly at a boarding school. I'll look for her and her sister while I wait for William & Sarah's marriage certificate to arrive. The mystery of William's twin Regimental numbers, 2401 and 931134, has been solved thanks to very helpful people at greatwarforum.org. People here may know all this already. Although it was possible to acquire another number by transfer to another unit or battalion this does not apply in his case. The entire Territorial Force was renumbered in 1917 and he was given a new 6 digit number. The numbering of members of the British armed forces sounds arcane and it was entirely possible for many members to have the same number because the regiments used the same range of numbers. Once the war intensified and thousands were dying people had to be moved around frequently. Duplicate numbers caused confusion and mistakes and is a part of the reason why the Territorial Force was renumbered, I think. The 931134 number places him probably in the 291 Brigade RFA which was headquartered in Woolwich, near his mother. There's no evidence that he was gassed and this part of the family story may be wrong, his condition is described with the terms "sickness", "deafness" and "disability". I think as a gunner he may have been deafened. But, it's quite possible he was gassed because in 1940 the warehouse holding military records in Arnside Street in Walworth was hit by an incendiary and the majority of records were burned. So I'll never know!