I have before proved the nation to be in the possession of a vast income, highly sufficient for all demands, to possess a vigorous agriculture, flourishing manufactures, and an extended commerce, in a word, to be a great industrious country. Now I conceive that it is impossible to prove such points, without proportionably proving the kingdom to be a populous one.
Arthur Young (1770) A six months tour through the north of England. p. 557; Partly cited in: Paul Mantoux (2013), The Industrial Revolution in the Eighteenth Century, p. 345