So, getting back to Enid...
In her last few years, in the late 60s, she suffered increasingly from Alzheimers. According to a drama-doc about her that i saw a few years ago, on one occasion she got up in the middle of the night and wandered off in her nightdress. A passing lorry driver saw her, and stopped and persuaded her to get into the cab, with the intention of dropping her off at the nearest police station. As they drove along, he asked her her name. "Enid Blyton", she replied. The lorry driver laughed and said "and I'm the king of Siam!".