Read it through once

But when men's minds were stirred up and invigorated by the great Revolution of 1788-1820, all sorts of new agricultural discoveries were made. Yet the cornfield on Pennell Brae was probably not drained or enclosed by stone walls and hedges until 1830 to 1840! About 1870, it was more profitable to its owner than it has ever been since, though even now it forms part of our British farmlands which yield, on the whole, a larger amount of oats per acre than those of any other country in the world (except possibly Denmark).