Tutor sive paedagogus Balduini ab anno fere 1170 fuit Willelmus archidiaconus (et postea archiepiscopus) Tyrensis. Ille ipse Balduinum aegrotantem (sicut mox revelatur, leprosum) observavit.
↑Quidam "die 15 Aprilis 1185", necrologia St Niçaise de Meulan citata, sed haud secure. Nonnulli "16 Martii 1185", nullo fonte ut videtur. Vide Thomas Vogtherr, "Die Regierungsdaten der lateinischen Könige von Jerusalem" in Zeitschrift der deutschen Palästina-Vereins vol. 110 (1994) pp. 51-81 ad pp. 65-67; Bernard Hamilton, The Leper King and his Heirs: Baldwin IV and the Crusader Kingdom of Jerusalem (Cantabrigiae: Cambridge University Press, 2000. ISBN 9780521641876) p. 210 et nota 85 (Paginae selectae apud Google Books)
Marshall W. Baldwin, "The Decline and Fall of Jerusalem, 1174-1189" in Kenneth M. Setton, ed., A History of the Crusades (6 voll. Philadelphiae: University of Pennsylvania Press, 1955-1989) (Anglice)Textus vol. 1 (1969) pp. 590-621
Bernard Hamilton, The Leper King and his Heirs: Baldwin IV and the Crusader Kingdom of Jerusalem. Cantabrigiae: Cambridge University Press, 2000. ISBN 9780521641876 (Paginae selectae apud Google Books)
Hans Eberhard Mayer, "Die Legitimität Balduins IV von Jerusalem und das Testament der Agnes von Courtenay" in Historisches Jahrbuch vol. 108 (1988) pp. 63-89