 While the arguments of Gollancz and early 20th century academics strongly supposed continuity between Old English verse forms and those of the Revival, academics of the 1960s and 70s increasingly began to stress the discontinuities in the forms, suggesting that 14th century alliterative verse was a purely new invention.Writers such as Elizabeth Salter, David Lawton and Thorlac Turville-Petre notably refused to hypothesise the existence of poetry that had not survived in the written record, preferring instead to seek possible inspiration for the Revival's poetry within rhythmic prose traditions of the 13th and 14th century.The rules by which alliterative verse was composed in Middle English are unclear and have been the subject of much debate.