In poetry, enjambment refers to lines that terminate without punctuation and without completing a phrase or clause. This is the inverse of an end-stop line, in which a line terminates with the same punctuation as a phrase or clause. End-stopped lines are common in prose, but enjambed lines are found in many types of poetry. Enjambment was first used to describe poems by Emily Dickinson; her work has been called "the mother of all enjambed poems." Other poets known for their use of enjambment include T. S. Eliot, Robert Frost, W. H. Auden, Louis Zukofsky, and John Ashbery. According to Joseph M. Quirk et al., scholars of English literature who have studied enjambment extensively, its presence or absence is one of the most useful tools for determining whether a poem is early modern (1550–1650) or not. Early modern poets tend to use enjambment more often than not, while later poets do not usually use it. Furthermore, according to Stephen Burt, enjambment can also be used as a rhetorical device to create a sense of forward motion or even disruption within a poem.