**RUS... Russom, Geoffrey. 2017. The Evolution of Verse Structure in Old and Middle English Poetry: From the Earliest Alliterative Poems to Iambic Pentameter, Cambridge: Cambridge University Press. Rusten, Kristian A. 2015. "A Quantitative Study of Empty Referential Subjects in Old English Prose and Poetry." Transactions of the Philological Society 113.1: 53–75.