The circa date of this pair of plates is based on the three manganese plates in this pattern dated 1740 bearing the initials 'M/ D I', 'M/ W A', and 'MW' which are illustrated by Louis L. Lipski and Michael Archer, Dated English Delftware, Tin-glazed Earthenware 1600-1800, London, 1984, p. 106, nos. 465-467, the 'MW' example from the Robert Hall Warren collection is of the same shape as the present pair, published by Anthony Ray, English Delftware Pottery in the Robert Hall Warren Collection, London, 1968, pl. 25, no. 64. A circular plate in this pattern, inscribed and dated 'A/ HT/ 1740' was in the Collection of Thomas Burn, Rous Lench Court, sold, Christie's, London, May 29-30, 1990, lot 21.