One striking thing about Mr. Darcy's income is you could still survive on it (not inflation-adjusted) in a developed country today. It's right around the individual poverty line. It's also close the median household income worldwide.
There's a presidential candidate (Andrew Yang) running on Universal Basic Income which would give every US citizen adult almost that amount ($1K/mo), just to survive especially as automation and AI is ravaging the top five common jobs in the states. The math actually works out to be feasible.
Assuming, at a minimum, health care and other social social safety net services. But, yes, Mr. Darcy was very wealthy by the standards of the time and would be today. (Although, as others have pointed out, comparing wealth across such a long time period is difficult in many ways.)
