This is fascinating, thank you. Most (not quite all) of that was new to me.

had those English marriages for Fritz and Wilhelmine ever worked out, they‘d have gotten from the frying pan into the fire

Wilhelmine, definitely. Fritz? I seem to recall Amelia more or less had her shit together, or at least if there are any similar anecdotes about her, I'm not aware of them (but please feel free to share!).