Liber Peregrinationis
As Salvadore (p. 5) translates, Jacapo, returning from a pilgrimage to Jerusalem, writes that
The full account can be found in Jacopo da Verona. Liber peregrinationis. Edited by Ugo Monneret de Villard. Rome: Libreria dello Stato, 1950They are black Ethiopians from among the people of Prester John, who is one of the greatest princes in the world. Those Nubians sing for the whole day and the whole night. They consecrate fermented bread... They always carry... a cross in their hand, even in the presence of the Sultan and in the presence of the Saracens, and they pay no tribute through the entire land of the Sultan. Also... Prester John, the lord of Nubia and Ethiopia, has the potential within his own real to divert the Nile River... If that land did not receive this river it would be wholly uninhabitable, as evidently [is the case for] all of Egypt; and, similarly, Prester John is more powerful than the Sultan.