I have heard of Stratton Park although I have not visited - it looks like a lovely stately home although a little out of Mr. Bingley's budget, as his annual income was considerably less than Sir Francis Baring's!

To Benedicte: how much an estate yields per year depended partly on its management. An estate run efficiently and cost-effectively naturally brings in more money than one which is not run so efficiently. I live on a country estate owned by a Lord and the estate has a manager who sees to the running of it. This is how it was done in the Georgian era too. According to Shapard's Annotated P&P, "Stewards supervised the running of an estate and the job required substantial skill" (p. 151). So Darcy would definitely have a steward at his Derbyshire estate and when Mr. Bingley decides to buy his own estate, he will have one too, to aid him in the upkeep of the estate. As far as I know, there is no way of telling how much Netherfield cost to rent. Rental prices, like now, varied depending on how much parkland and grounds one wanted or how big a house. BTW, the 4% or 5% yield refers to the interest rate.