Faith, Religion, and Manners of the Ethiopians
Góis had asked Saga za Ab, and Ethiopian monk stranded in Portugal, to compose an accurate depiction of Ethiopian Christianity, given the inaccuracies present in the Legatio, which drew largely on the accounts of Matthew of Armenia who, though an Ethiopian Christian, was non-native and a layperson. Saga za Ab completed his treatise in 1534, after which Góis translated it to Latin.
Although appreciated by the Erasmus-influenced intellectuals of the time, the text was banned by the Cardinal Infante Dom Henrique, Grand Inquisitor of Portugal for "implicitly advocat[ing] a kind of world-wide confederation of Christians" (Silverberg, 300).