Agreed, @mauvishagain -- that fits my sense of the 'real' timeline insofar as we can put it together. What interests me is at what point in the development of the MS a significant massaging of that timeline started to creep in, and/or how it related to the other big alteration, concealing the reason for the loss of their home.
By RW's account in TWS, their daughter was the first to read her MS, then called Lightly Salted Blackberries, even before Moth, for whose birthday she wrote it. But what exactly was she reading?
If it was really only ever intended for Moth's eyes only (which I'm slightly disbelieving about for a number of reasons), there won't have needed to be any backstory about losing the farm, as he already knew every last messy detail of that, but neither will there have needed to be any backstory about the diagnosis, whenever it happened. Only a reader who is not Moth would have needed that. So that presumably came later, though it's not clear whether she would have done it before querying agents, or with her agent before it was sent out, or after she'd signed with PRH..
And I'm dubious about whether someone who didn't have at least the possibility of publication in mind would have written something supposedly for her husband with him constructed as a character in the third person, rather than as the addressee. But obviously 'You picked up the tent and dropped it immediately, you were so weak' is not a publishable MS intended for a general reader.
If she did originally address the entire thing to Moth, she presumably altered it before she sent out the MS to agents.
I'd also be interested in how the construction of Moth altered between the original MS and the published version. He's presented as so saintly, charismatic etc in the published book. I can't imagine presenting that straight-faced to my husband of many years, especially when he knows the real story of both the house repossession and the likely illness timeline.