Cambridgeshire.
On a common called Midsummer Green, in the parish of Barnwell, an annual fair is held, commencing on Midsummer Day, and continuing for a fortnight. This fair is supposed to have originated with the assemblages of children at this place on the eve of St. John the Baptist’s Day, whose yearly gatherings being attended by a considerable concourse of people, attracted the notice of some pedlars, who began to dispose of their merchandise on this spot as early as the reign of Henry I. The articles brought for sale are chiefly earthen-wares, whence the festival has attained the name of Pot fair. The fair is proclaimed on the eve of Midsummer Day by the heads of the University, first in the middle of the village, and afterwards on the green where it is celebrated. It appears to have assumed its legal form in the reign of Henry III.—Brayley and Britton, Beauties of England and Wales, 1809, vol. ii. p. 110.