Lyn
By locals. The islanders have a faith, possibly Christian? The shipwrecked man has come from a society where there is no faith. Some of the islanders want the man killed as a heretic. The story then goes on tp prove disprove the existence of God, by experimenting with a child, who is brought up with no belief system.
Lobstergirl
The description of Knowledge of Angels:
"It is, perhaps, the fifteenth century and the ordered tranquility of a Mediterranean island is about to be shattered by the appearance of two outsiders: one, a castaway, plucked from the sea by fishermen, whose beliefs represent a challenge to the established order; the other, a child abandoned by her mother and suckled by wolves, who knows nothing of the precarious relationship between Church and State but whose innocence will become the subject of a dangerous experiment.
But the arrival of the Inquisition on the island creates a darker, more threatening force which will transform what has been a philosophical game of chess into a matter of life and death..."