The chronicle of John of Worcester is one of the most important sources of earlier English history. The chronicle, which was written at Worcester by 1140, is of considerable interest to historians of both the Anglo-Saxon period and of the late eleventh and twelfth centuries. Its backbone isa translation of an Anglo-Saxon chronicle with varied connections, and this edition makes possible the detailed examination of these allegiances. Its annals for the second half of the ninth century provide one of the earliest surviving witnesses to the text of Asser's Life of Alfred. The authorhad access to otherwise unrecorded sources of events in the eleventh century, and the chronicle's value as a contemporary source for the reign of Stephen has long been acknowledged. Dr McGurk has completed the edition of the work left unfinished by R. R. Darlington on his death in 1977. Thechronicle will be published in three volumes. Volume II covers the annals for 450 to 1066, and volume III the annals from 1067 to 1140. Volume I will be published last, and will contain a general introduction and supplementary material.