The historical romance of The Siege of Jerusalem was the most widely dispersed and popular Middle English alliterative poem in the medieval period apart from Piers Plowman. It was previously edited for the Society byEugen Kölbing and Mabel Day [O.S. 188 [1932]]. This new edition offers a critical text based upon all the surviving manuscripts, some unavailable to Kölbing and Day. All extant manuscripts are fully described, and the editors discuss the sources and authorship, as well as the editorial methods best suited for presenting this text, which survives in many copies. RALPH HANNA is Professor of Palaeography at the University of Oxford, and Tutorial Fellow at Keble College. DAVID LAWTON is Professor of English at Washington University, St Louis.