The Old French ‘Rothelin’ Continuation of William of Tyre’s Historia provides one of the best contemporary narratives of the history of the crusades and of the Latin Kingdom of Jerusalem in the mid-thirteenth century. Covering the period 1229-61, it has vivid accounts of the disastrous expeditions led by Count Theobald of Champagne (1239-40) and King Louis IX of France (1248-54) as well as of other events in the East. But the text contains far more than this, with a detailed description of Jerusalem itself, songs of protest written by crusaders, and a variety of marvels and adventures, including stories of Alexander the Great, and the poisonous snakes encountered by the Roman army under Cato. This text is here translated into English for the first time, together with a narrative for the same years taken from another Old French Continuation of William of Tyre’s work, part of L'Estoire de Eracles. Both accounts are translated from the Receuil des historiens des croisades: Historiens occidentaux vol. 2 (Paris, 1859). An introduction and full notes make these thirteenth-century events and ideas accessible to students of medieval history and to anyone interested in the lives and patterns of thought of people of that time.