[A] curious fragment goes from cannibalism to the origin of pigs. A cannibal chief had human victims taken to
him
regularly, and was in the habit of throwing the heads into a cave close by. A great many heads had been cast in,
and he
thought no more about them. One day, however, he was sitting on a rock outside the cave when he heard an unusual
noise.
On looking in, the place was full of pigs, and hence the belief that pigs had their origin in the heads of men.
— George Turner, Samoa, A Hundred Years Ago and Long Before:
Together
with Notes on the Cults and Customs of Twenty-three Other Islands
in the Pacific (Macmillan, 1884)