Fertur enim iste de antiqua progenie illorum, quorum in Evangelio mentio fit, esse Magorum, eisdemque, quibus et isti, gentibus imperans, tanta gloria et habundancia frui, ut non nisi sceptro smaragdino uti dicatur (It is reported that he is the descendant of those Magi of old who are mentioned in the Gospel, and to rule over the same nations as they did, enjoying such glory and prosperity that he uses no sceptre but one of emerald). Otto von Freising, Historia de Duabus Civitatibus, 1146, in Friedrich Zarncke, Der Priester Johannes, Leipzig, Hirzel, 1879 (repr. Georg Olms Verlag, Hildesheim and New York, 1980, p.848; Adolf Hofmeister, Ottonis Episcopi Frisingensis Chronica; sive, Historia de Duabus Civitatibus, Hannover. 1912, p.366.