Mannyng or Manning, Robert, fl. 1298–1338, English poet, b. Brunne (modern Bourne), Lincolnshire; also called Robert of Brunne. He was a monk in the Gilbertine order. Mannyng is known chiefly for his Handling Sin, a lively religious manual adapted from William of Wadington's Manuel des péchés. Illustrating the vices and weaknesses of man, this work is an excellent reflection of the manners of the time. Mannyng is also the author of a chronicle of England based on Wace and de Langtoft.