Primary sources Text editions and/or modern translations – in whole or in part – along with publications containing additions and corrections, if known. Diplomatic editions, facsimiles and digital image reproductions of the manuscripts are not always listed here but may be found in entries for the relevant manuscripts. For historical purposes, early editions, transcriptions and translations are not excluded, even if their reliability does not meet modern standards.

[ed.] [tr.] Bartlett, Robert, Gerald of Wales. De principis instructione, Oxford Medieval Texts, Oxford: Oxford University Press, 2018.
[ed.] Warner, G. F., Giraldi Cambrensis opera, 8 vols, vol. 8: De principis instructione liber; with index to vols. 1–4 and 8, London, 1891.
Internet Archive: <link>

Secondary sources (select)

Petrovskaia, Natalia, “East and west in De principis instructione of Giraldus Cambrensis”, Quaestio Insularis 10 (2009): 45–59.
Carey, John, “The finding of Arthur’s grave: a story from Clonmacnoise?”, in: John Carey, John T. Koch, and Pierre-Yves Lambert (eds), Ildánach Ildírech. A festschrift for Proinsias Mac Cana, 4, Andover and Aberystwyth: Celtic Studies Publications, 1999. 1–13.
Lapidge, Michael, and Richard Sharpe, A bibliography of Celtic-Latin literature, 400-1200, Royal Irish Academy Dictionary of Medieval Latin from Celtic Sources, Ancillary Publications, 1, Dublin: Royal Irish Academy, 1985.
26–27 [id. 70.]
Hardy, T. D., Descriptive catalogue of materials relating to the history of Great Britain and Ireland to the end of the reign of Henry VII, vol. 2: From A.D. 1066 to A.D. 1200, London: Longman, Green and Roberts, 1865.
Internet Archive: <link>
[id. 611.]