Sherlock, there are several points I'd like to raise, but ONE stands out above all others.
You keep talking about how Psalm 51 is highly relevant to what happened that night and how this would be known by anyone with knowledge of the Bible. Before we go any further, I'm going to say that such a person would be FAR more likely to be June, NOT Sheila.
I think it's safe to say that I had way more religious instruction than did Sheila but I can only quote 2 Psalms and I only know the number of one of those. No prizes for guessing which, but NEITHER is a plea for forgiveness after having committed murder. Why would it be? Who of us would suspect we/family/friends would ever need to make such a request. Which of us would instil in a child, the means of asking forgiveness for having committed murder, when, if we're going to insist that certain Psalms are learned, there are so many more to choose from? It isn't a Psalm which would automatically be known, which is why, IF the page is relevant, not just being MADE to be, it would have been JUNE who was aware of it.
I hope we can discuss all of your points one by one - so lets start with this point first - then discuss your other points ...
I agree that June would have been far more likely to have known Psalm 51 than Sheila - she would have studied the Bible far more than most people i am sure ...
But we know that June did not commit the murders ...
And if Sheila had killed someone else in the house before June then i cannot see that even June would have started reading Psalm 51 to Sheila - highly improbable ...
So for those reasons i rule out entirely the possibility that it was June who had turned to Psalm 51 ...
And for reasons explained in previous posts i KNOW that Psalm 51 is highly relevant to the events of that night ie seeking forgiveness after having committed murder ...
All we know about Sheila for sure is that she had at least some interest in religion and would have at least read some of the Bible at some point in her life - it is possible she had read or studied it a lot but equally possible she had only read / studied it in a very minor way ...
But even if she only had limited knowledge of the Bible it is perfectly conceivable that by chance one of the things she had learned was the significance of Psalm 51 and it had stuck in her mind ...
For example during religious education at school or maybe during a church sermon a teacher or Vicar had been discussing Psalm 51 and it's meaning - she might well have remembered this ...
I do doubt however that she on her own had been reading the Bible and had worked out it's significance - unless she was using a very modern translation of the Bible - this is because the old fashioned words used in the older versions (specifically the word bloodguilt) would be hard for someone of Sheilas generation to fully understand unless it was explained to her by a knowledgeable religious person ...
It is perfectly possible however that Sheila may have read a modern translation of the Bible which instead of using the word bloodguilt would have spelt it out in plain english ie "guilt for having killed someone ..."
I am very interested to hear your other points relating to my posts in this thread ...
What i have posted is of course only theory - however it seems perfectly possible to me at this point ...
If you or others can point out how where or why this theory falls down then i would be grateful ...
As you know i have an open mind as to the events of that night ...