chunk: More years pass and Crusoe discovers native cannibals, who occasionally visit the island to kill and eat prisoners. At first he plans to kill them for committing an abomination but later realizes he has no right to do so, as the cannibals do not knowingly commit a crime. He dreams of obtaining one or two servants by freeing some prisoners; when a prisoner escapes, Crusoe helps him, naming his new companion "Friday" after the day of the week he appeared. Crusoe then teaches him English and converts him to Christianity.
  After more natives arrive to partake in a cannibal feast, Crusoe and Friday kill most of the natives and save two prisoners. One is Friday's father and the other is a Spaniard, who informs Crusoe about other Spaniards shipwrecked on the mainland. A plan is devised wherein the Spaniard would return to the mainland with Friday's father and bring back the others, build a ship, and sail to a Spanish port.