Here is some further reading that might help to contextualize this resource.
Lucy Adrian, ‘The nineteenth century Gazette Corn Returns from East Anglian Markets,’ Journal of Historical Geography, 3, 3 (1977) 217-236, esp. 218-220; see also the debate between Wray Vamplew and Lucy Adrian in Journal of Historical Geography, 4,3 (1978) 291-293.
D.A. Baker, ‘The marketing of corn in the first half of the 18th century’, Agricultural History Review 18 (1970)
D.A. Baker, Agricultural Prices, Production and Marketing, with Special Reference to the Hop Industry: North-East Kent, 1680-1760 (New. York 1981)
D. G. Barnes, History of the English Corn Laws 1660-1840 (London, 1930).
Susan Fairlie, ‘The Corn Laws and British wheat production 1829-76’ in Economic History Review, 2nd series 22 (1969) 88-116.
C.R. Fay, The Corn Returns and Social England (Cambridge, 1932).
D. Ormrod, English Grain Exports and the Structure of Agrarian Capitalism 1700-1760 (Hull, 1985)
Richard Shelton, ‘Practical economics in eighteenth-century England: Charles Smith on the grain trade and the corn laws, 1756-1772,’ in Historical Research, v. 81, pp. 636-662.
Joan Thirsk (ed.), The Agrarian History of England and Wales, especially Volumes V, 1640-1750 (ed. J. Thirsk, Cambridge 1985) and VI, 1750-1850 (ed. G.E. Mingay, Cambridge 1989).
‘James the Second, 1685: An Additionall Act for the Improvement of Tillage. [Chapter XIX. Rot. Parl. nu. 19.]’, Statutes of the Realm: volume 6: 1685-94 (1819), pp. 21-23.
10 Geo III c 39 in The statutes at large, from Magna Charta, to the twenty-fifth year of the reign of King George the Third, inclusive: volume 8 (1786), pp. 119-120.