This first part reminded me a bit of Frank Churchill, and the latter reminded me of the Bingleys:
"...John Parker later took the name of Toulson, in order to inherit property from his distant relatives...he ended his days as a landed gentleman. Thus, for generations the land/trade 'boundary' was crossed and recrossed by individuals in the same family."
It's interesting how during this time period "genteel society" and "trade and the professions" started to socially intermingle. I can see this transition in the way Caroline Bingley forgets her roots and disparages others whose fortunes were made in trade.