Hi Tessa, hope you are well.
Have found the references but they are on another forum so before I post the links, I'll just ask the site owner if she is happy for us to link to that site.
I think you're right about Burke. I feel desperately sorry that he will probably always struggle to have a normal life. Siblings do occasionally act out jealousy (one of my very favourite childhood anecdotes is my oldest sister cutting off my second sister's lovely auburn hair because she was pee-ed off at the attention it got from adults

) but this stuff very rarely gets violent. I wonder what the stats are for sibling murder during childhood. Offhand, I can't think of a single example. Anyone else know any examples?
You hit the nail on the head about Patsy and how the simple solution looks the most likely. I'll check out your theory on the other thread. Sad thing is, I think Patsy was probably lovely as a person. I envisage her as being a bit all fur coat and no knickers and prone to drama buta s being essentially lovely....
Got to agree with DeeDee: ACR's site is wonderful and she's one of the finest human beings you'll ever come across