Thank you for those excellent replies, folks!
It is our understanding that all the cemeteries around were looked after locally and independently until some time around 1948 when they all came under one umbrella, the Argyll Council or a division of it. I imagine they collected up all the records kept at each cemetery. My father says that in the case of Glenorchy, the caretaker was for many, many years a Peter Sinclair. Peter was a local man of a native family. He kept good records but also knew a great deal about the families he dealt with. He was the man my grandfather went to when baby Annie Fletcher died in 1930. These things have to be dealt with quickly, but you also have to be sure. Peter Sinclair would not have allowed the burial of Annie in that plot unless he was absolutely certain it was the correct thing to do. Unfortunately, that local touch is now gone.
I was in touch with the local historical society and I was getting somewhere I thought but they recently changed their contact person so I may have to start over again. I messaged the Oban Times via their Facebook page just yesterday ... that might be a very good lead indeed.
This means a lot to my Dad. The Fletchers (originally Macinlesdairs) were in Glen Orchy for the better part of 1000 years. They were cattle dealers and drovers in the area around barren Achallader. My father was the last one ever born there. He visited the cemetery many times and his father pointed out a row of simple, unfinished field stones in the old burying area that marked the graves of some very early Fletcher ancestors. Those stones are gone now. My father just wants to know that he has the right to be buried with his immediate family and his ancestors should he choose to do so. At 83 years of age, I think this needs to be sorted soon.
Thanks again!
Mary