My brain has gone to mush atm and as I was trying to go to sleep last night, I was trying work out what the supposed chronology was of the Alastair family in the novels in which they appear. I have not checked against the events nor the costumes nor googled, but wondered if others had.
We know that Avon, let's call him Justin, was out in the 45. We know that when he meets Leonie he is at least 45. So assuming he was 25 in 45 ( to make the arithmetic simpler) that would mean they get together in 1760. If 35 then 1750. Going with that one at the moment.
(If I checked the age of Conde I might be able to specify. )
Mme de Pompadour didn't die until 1764 but was Maitresse en titre from 1745.
We know that Vidal takes Mary to Paris before the Revolution. So let's assume he is a little older than her, about 23. Let's assume he was born in 1751. So he's there in 1774.
New generation arrives whom I think we never meet, let's assume in 1775. This is where I start to get stuck.
We meet Babs in An Infamous Army in 1815. She has already been disastrously married and fortunately widowed iirc. I can't recall if we are told how old she is. But if she is eg 23 she would have been born in 1792. I can't recall if she is older than her wastrel brother, but if not new generation as above would have had to have DTD in wedlock at the age of about 17.
Clearly, by plying around with Avon's age we can make this just work.
But, critically, I cannot recall in which year Regency Buck is set. But Judith has at least one smallish child by An infamous army, and Charles has fought and been wounded in Regency Buck.
Please tell me, someone, that it all does work and how you have worked it out and what the refs are?