It was a law among them that if one of these snakes entered a kraal it must not be killed, or even driven away, under pain of death, but must be allowed to share with the human occupants any hut that it might select.

As a result of this enforced hospitality deaths from snake-bite were numerous among the people; but when they happened in a kraal its owners met with little sympathy, for the doctors explained that the real cause of them was the anger of some ancestral spirit towards his descendants.

Now, before John was despatched to instruct Owen in the language of the Amasuka a certain girl was sealed to him as his future wife, and this girl, who during his absence had been orphaned, he had married recently with the approval of Owen, who at this time was preparing her for baptism.

On the third morning after his marriage John appeared before his master in the last extremity of grief and terror.
"Help me, Messenger!" he cried, "for my ancestral spirit has entered our hut and bitten my wife as she lay asleep." "Are you mad ?" asked Owen.

"What is an ancestral spirit, and how can it have bitten your wife ?" "A snake," gasped John, "a green snake of the worst sort." Then Owen remembered the superstition, and snatching blue-stone and spirits of wine from his medicine chest, he rushed to John's hut.