I think the possible death in Annan is not correct. The maiden name looks not to be correct for that lady. Always a problem with the index that you cannot tell which way round the names go. This lady also had a sister who died in Annan a few years earlier with the same details for mother's maiden name and the other surname (not the one you need).
Also, I was following up on another possibility from a death in 1987 also in Dumfrieshire which looked promising. However, her marriage shows in England in 1934, so...not her either.
Monica