Ann Eaton did write a few things down. She did not beleive Sheila was capable of going on such an unbelievable savage murderous rampage. Or did her family want Jeremys inheritance 
Julies diaries seem disorganised, messing & abreviated. In other words written for her eyes only on the day. But appreciate what they say are so damaging that Jeremys supporters have to say they are made up.
A VERY sweeping statement, Adam. You have no way of knowing what AE wrote, and given her determination to get Jeremy blamed one can only assume she wrote down somewhat MORE than "a few things." She certainly didn't WANT Sheila to have committed the murders but she didn't know her well enough to know whether she could have done it or not. If you recall, she went out of her way to avoid contact with Sheila and didn't bother to reply when Sheila wrote to her. You'll find this in her WS. As for whether her family wanted that inheritance. THEY saw that inheritance as theirs and apart from that there were loans attached to it that had Jeremy chosen to call in MAY have left them financially embarrassed.
Julie's diaries were all you say of them. So, too, were all my college notes. Taken down in a form of crude shorthand for me to expand on/talk about at a later date. Either those diaries are retrospective OR Julie was psychic. How could she write about, on Jan 2nd, what didn't happen until the following August?