[l] Einhard, Vita Caroli Magni.

[m] Chronicles of Moissiac.

[n] Marianus Scotus, Universal Chronicle from the Creation to the Year 1083.

[o] Sigebert of Gemblours, Chronique Universelle.

[p] Otto von Freysing, Chronik.

[q] Stephen de Bourbon, Chronicle.

[r] Martinus Polonus, Chronicon de Summis Pontificibus.

[s] Liutprand, Antapodosis.

Chapter III. The High Noon of the Papacy

[b] O. J. Reichel, op. cit.