You haven't mentioned when James died.....have you checked if this is a possibility for him:
https://billiongraves.com/grave/JAMES-BURTON/23991624
(map with location marker is further down same page).
I must be in an altered state of reality somehow.
Yes the above is my uncle, the dates (d. 1977) check out and it's the correct cemetery.
I never knew him but I learnt that my dear aunt (who I did know), died & it took me some years to find the year of death/cemetery interned in, so I need to actually see her name on the head stone because I won't believe it till I see it, kind of thing.
Caroline Gilchrist for the GCC emailed me that my aunt Mrs Agnes Burton has been interned with her husband in Section 16, Lair # 803 after she died in 2017.
It's been such a journey just trying to find who to email and checking all the online resources without luck (I wasn't looking for James back then as I didn't yet know they had been interned together. I also didn't know where he was either).
I asked the nice chap who is doing the St Kentigern's project and he told me the grave doesn't exist in Section 16. He very kindly sent me his closest match from Sect. 16, but it isn't the correct grave.
It all feels a bit surreal. Our son is visiting Glasgow for his 1st time but has only a limited amount of time and I was hoping for him to see the graves of his ancestors. I have already given him precise directions to the other graves and was hoping to do the same for my aunt's grave.
I think that some things just get too complicated & I may have to travel myself sometime to Scotland and visit St Kentigern's to find out if she's there or not.
Everyone has been fabulous though, thanks for all the help. .
Cheers,
Martin