Sources for the life of William Longsword

920s-940s (1) Flodoard of Reims, Les Annales de Flodoard, edited by Philippe Lauer, Collection des textes pour servir à l'étude et à l'enseignement de l'histoire 39 (Paris: Picard, 1905).
c. 940 Possible coin of William Longsword, Musée des Antiquités de Rouen.
c. 943 The Planctus for William Longsword.
948 Artoldus, archbishop of Reims, "Libelli Artoldi," in Die Konzilien Deutschlands und Reichsitaliens, 916-1001, volume 1, 916-960, ed. Ernst-Dieter Hehl, Monumenta Germaniae historica, Legum sectio III, Concilia, vol. 6.1 (Hannover: Hahn, 1987).
948-950s (2) Flodoard of Reims, Historia Remensis ecclesiae, edited by Martina Stratmann, Monumenta Germaniae Historica, Scriptores 36 (Hannover: Impensis Bibliopolii Hahniani, 1998).
990s Richer of Reims, Historiae, edited by Hartmut Hoffmann, Monumenta Germaniae Historica, Scriptores 38 (Hannover: Impensis Bibliopolii Hahniani, 2000). [2.33]
996x1001 "The Text of the Fécamp Chronicle in MS Rouen Bib. mun 528 (A 362)," edited by Mathieu Arnoux, Anglo-Norman Studies 22 (1999): 42-48. (3)
1000s-10s Dudo of Saint-Quentin, De moribus et actis primorum Normanniæ ducum, edited by Jules Lair, Mémoires de la Société des Antiquaires de Normandie 23 (Caen: F. Le Blanc-Hardel, 1865).
1012 Charter, Archives départementales de la Seine-Maritime 9 H 906 (Fauroux, no. 14 bis).
1020s Adémar de Chabannes, Chronique, edited by Jules Chavanon, Collection de textes pour servir à l'étude et à l'enseignement de l'histoire 20 (Paris: Picard, 1897). [148]
1050s William of Jumièges, Orderic Vitalis, and Robert of Torigni, The Gesta Normannorum Ducum, 2 volumes, edited and translated by Elisabeth M. C. van Houts, Oxford Medieval Texts (Oxford: Clarendon Press, 1992-1995). [3.12]
1074x1089 "Inventio et Miracula Sancti Vulfranni," edited by Jean Laporte, Société de l'histoire de Normandie, Mélanges 14 (1938): 7-87. [27]
1090x1095 "Libellum de revelatione aedificatione et auctoritate Fiscannensis monasterii," in Histoire de l'Abbaye de Fécamp en vers français du XIIe siècle, ed. Arthur Långfors, Annales Academiae Scientiarum Fennicae 22.1 (Helsinki: Suomalainen Tiedeakatemia, 1928), 12-40; emended by Mathieu Arnoux, "La fortune du Libellus de revelatione, edificatione et auctoritate Fiscannensis monasterii: Note sur la production historiographique d'une abbaye bénédictine normande," Revue d'histoire des textes 21 (1991): 135-58.
c. 1100 Lambert of Saint-Omer, "Genealogia comitum Normannorum," in Lamberti S. Audomari Canonici Liber Floridus: Codex authographus bibliothecae universitatis Gandavensis, ed. Albert Derolez (Ghent: J. Story-Scientia, 1968), fol. 76r.
12th c. Cartulary copy of notice from c. 1000, Bibliothèque municipale de Rouen MS 1193, fol. 31r, no. 18.
12th c. Cartulary copy of a notice from 1022x1026, Cartulaire du Mont-Saint-Michel, Bibliothèque municipale d'Avranches, MS 210, fol. 20r (Fauroux, no. 49); the reference to William Longsword is probably forged.
1107 (4) Renaud, archdeacon of Saint-Maurice d'Angers, "Annales qui dicuntur Rainaldi," in Recueil d'annales angevines et vendômoises, ed. Louis Halphen, Collection de textes pour servir à l'étude et à l'enseignement de l'histoire 37 (Paris: Picard, 1913), 80-90.
1110s-20s Orderic Vitalis, The Eccelesiastical History, 6 volumes, edited and translated by Marjorie Chibnall, Oxford Medieval Texts (Oxford: Clarendon Press, 1969-1980). [1:154; 2:6, 8]
1120s William of Malmesbury, Gesta Regum Anglorum, 2 volumes, edited and translated by R. A. B. Mynors, R. M. Thomson and Michael Winterbottom, Oxford Medieval Texts (Oxford: Clarendon Press, 1998-1999). [2.145]
1130s Pierre Bechin, "Chronicon Petri filii Bechini," in Recueil de Chroniques de Touraine, ed. André Salmon (Tours: Imprimerie Ladevèze, 1854), 1-63. [47]
1160s Wace, Roman de Rou et des ducs de Normandie, 3 volumes, edited by A. J. Holden (Paris: Picard, 1970-1973).
1180s Benoît de Saint-Maur, Chronique des ducs de Normandie, 4 volumes, edited by Carin Fahlin, Bibliotheca Ekmaniana Universitatis Regiae Upsaliensis 54 etc. (Uppsala: Almqvist and Wikselle, 1951-1979).
1220x1243 Philippe Mousket, bishop of Tournay, Chronique rimée de Philippe Mouskes, 2 volumes, edited by Frédéric-Auguste-Ferdinand-Thomas de Reiffenberg, Collection des Chroniques Belges inédites 2 (Brussels: M. Hayez, 1836-1838).
13th c Cartulary copy of a charter from 1028-1033, Fauroux no. 67.
c. 1300 Cartulary copy of a charter from 968, Fauroux no. 3.

Notes

1. Flodoard seems to have written the Annales contemporary to the events described; Michel Sot, Un historien et son Église au Xe siècle: Flodoard de Reims

(Paris: Fayard, 1993), 83-87.

2. Flodoard began work on the Historia after June 948, and interrupted work for church councils in 948 and 952; Sot, Un historien et son Église, 101-102.

3. This chronicle is closely tied to Dudo's book; Arnoux believes Dudo wrote the 528 as well.

4. Halphen believes that the Annales of Renaud were compiled in c. 1107, using a now-lost chronicle written about 1075 for the years before then. If so, this mention of William was copied in 1107 from one written in 1075.