The version of the Gesta Herewardi that exists today is a transcription of this work, which was incorporated into a book containing charters and other material relating to the abbey at Peterborough known as the "Register of Robert of Swaffham", but variant descriptions such as "Robert of Swaffham's Book" are also found.Martin, Janet D., The Cartularies and Registers of Peterborough Abbey, Northamptonshire Record Society, 1978, pp. 7–12. According to the historian Janet D. Martin, the book was created in "about 1250", and originally ended with the Gesta Herewardi, but further material, unrelated to the Hereward story, was added in the 14th century.Martin 1978. Note that Geoffrey Gaimar's early 12th-century Estoire des Engleis, written in Anglo-Norman French, also includes information regarding the deeds of Hereward the Wake, as do the Latin Liber Eliensis, of the mid-12th century, and the slightly later Latin history of Peterborough Abbey by Hugh Candidus: see e.g. Short, Ian (ed. & trans.), Geffrei Gaimar Estoire Des Engleis History of the English, OUP, 2009; Liber Eliensis, Blake, E.O. (ed.), Camden Third Series, Royal Historical Society, 1962 (in Latin) or Fairweather, Janet, Liber Eliensis: A History of the Isle of Ely from the Seventh Century to the Twelfth, Boydell, 2005 (in English); and Mellows, W.T. (ed.), The Chronicle of Hugh Candidus a Monk of Peterborough, OUP, 1949 (in Latin) or The Peterborough Chronicle of Hugh Candidus (3rd edn.), Mellows, W.T. (ed. & trs.), Peterborough Museum Society, 1980 (in English). Cf. the Anglo-Saxon Chronicle, in e.g. Garmonsway, G.N., The Anglo-Saxon Chronicle, Dent, Dutton, 1972 & 1975, pp. 205–8.
The version of the Gesta Herewardi that exists today is a transcription of this work, which was incorporated into a book containing charters and other material relating to the abbey at Peterborough known as the "Register of Robert of Swaffham", but variant descriptions such as "Robert of Swaffham's Book" are also found.Martin, Janet D., The Cartularies and Registers of Peterborough Abbey, Northamptonshire Record Society, 1978, pp. 7–12. According to the historian Janet D. Martin, the book was created in "about 1250", and originally ended with the Gesta Herewardi, but further material, unrelated to the Hereward story, was added in the 14th century.Martin 1978. Note that Geoffrey Gaimar's early 12th-century Estoire des Engleis, written in Anglo-Norman French, also includes information regarding the deeds of Hereward the Wake, as do the Latin Liber Eliensis, of the mid-12th century, and the slightly later Latin history of Peterborough Abbey by Hugh Candidus: see e.g. Short, Ian (ed. & trans.), Geffrei Gaimar Estoire Des Engleis History of the English, OUP, 2009; Liber Eliensis, Blake, E.O. (ed.), Camden Third Series, Royal Historical Society, 1962 (in Latin) or Fairweather, Janet, Liber Eliensis: A History .of the Isle of Ely from the Seventh Century to the Twelfth, Boydell, 2005 (in English); and Mellows, W.T. (ed.), The Chronicle of Hugh Candidus a Monk of Peterborough, OUP, 1949 (in Latin) or The Peterborough Chronicle of Hugh Candidus (3rd edn), Mellows, W.T. (ed. & trs.), Peterborough Museum Society, 1980 (in English). Cf. the Anglo-Saxon Chronicle, in e.g. Garmonsway, G.N., The Anglo-Saxon Chronicle, Dent, Dutton, 1972 & 1975, pp. 205–8.