Usserius, Jacobus [詹姆斯·厄谢尔]. Britannicarum Ecclesiarum Antiquitates, Quibus Inserta Est Pestiferæ adversus Dei Gratiam a Pelagio Britanno in Ecclesiam Inductæ Hæreseos Historia [Antiquities of the Britannic Churches, into Which Is Inserted a History of the Pestilent Heretics Introduced against the Grace of God by Pelagius the Briton into the Church], Vol. I., Ch. VIII, (Dublin), 1639. Reprinted as The Whole Works of the Most Rev. James Ussher, D. D. Lord Archbishop of Armagh, and Primate of All Ireland, Vol. V, Ch. VIII, p. 236. Hodges, Smith, & Co. (Dublin), 1864. （拉丁語）
Usserius, Vol. I, Ch. V, reprinted as Ussher, Vol. V, p. 82.（拉丁語）
歐特羅皮烏斯. Breviarium historiae Romanae [Abridgement of Roman History]. . 21–22（拉丁语）.
raco.cat
Archaeological evidence of late 4th-century urban collapse is analysed by Simon Esmonde Cleary. The Ending of Roman Britain. 2000.; the "de-romanisation" of Britain is the subject of several accounts by Richard Reece, including "Town and country: the end of Roman Britain", World Archaeology12 (1980:77–92) and "The end of the city in Roman Britain", in J. Rich (ed.), The City in Antiquity (1992:136-44); Simon T. Loseby. Power and towns in Late Roman Britain and early Anglo-Saxon England. Gisela Ripoll; Josep M. Gurt (编). Sedes regiae (ann. 400–800). Barcelona. 2000. 326f [2021-07-11]. （原始内容存档于2012-01-25） （拉丁语）. makes a strong case for discontinuity of urban life.
thelatinlibrary.com
維克多 (古羅馬). Liber de Caesaribus [Book of Caesars]. . 39（拉丁语）.
Archaeological evidence of late 4th-century urban collapse is analysed by Simon Esmonde Cleary. The Ending of Roman Britain. 2000.; the "de-romanisation" of Britain is the subject of several accounts by Richard Reece, including "Town and country: the end of Roman Britain", World Archaeology12 (1980:77–92) and "The end of the city in Roman Britain", in J. Rich (ed.), The City in Antiquity (1992:136-44); Simon T. Loseby. Power and towns in Late Roman Britain and early Anglo-Saxon England. Gisela Ripoll; Josep M. Gurt (编). Sedes regiae (ann. 400–800). Barcelona. 2000. 326f [2021-07-11]. （原始内容存档于2012-01-25） （拉丁语）. makes a strong case for discontinuity of urban life.
"Nomina Episcoporum, cum Clericis Suis, Quinam, et ex Quibus Provinciis, ad Arelatensem Synodum Convenerint" ["The Names of the Bishops with Their Clerics who Came Together at the Synod of Arles and from which Province They Came"] from the Consilia[27] in Francis Thackery（英语：Francis Thackery）[28]（拉丁語）
Although Ussher refers the reader to his earlier discussion of the 28 Cities of Britain（英语：28 Cities of Britain）, which notes that "Cair Colun" may refer to either Colchester in Essex or to a settlement in 梅里奧尼斯郡.
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