Ir would help if you gave us what you have already learned about John Blair b 1911 Drymen, STIRLINGSHIRE, since you already have his birth record. E.g. what is stated on the birth record?There was only one John Blair born in Stirlingshire that year and that was this "Uncle John" in Drymen.There are two deaths occuring in Stirlingshire of a John Blair b 1911 in Stirlingshire, which could be him, assuming that he did not move out of Stirlingshire.One of these was an infant who d 1912 in Stirling, and the other lived a long life and d 1988 in DUNBLANE.This one also married in DUNBLANE in 1929, when he was just 18 years old.I note that Uncle John's mother died in 1928, which was the year before, when he was 17, which is an interesting coincidence, and perhaps a reason for him to marry.It is also likely that John Blair served in WW2, since he was only 28 at war's outbreak.I believe that Stirling Castle is the home of The Argyll and Sutherland Highlanders (or is it The Black Watch?), and they may have a record of him.Also, does your "friend" for whom you are doing the research know ANY personal details about him, since he is after all his/her uncle?There must be something she has learned from family lore!It sounds like there could be an interesting story behind this man.
I would be interested in hearing your response to what I have written and I await your reply.It would also be a good idea, if you are not following better leads, that you do a search for the Marriage Record I mentioned for 1929, as that will give you a lot of important information about him and probably identify who his family is.