Mrs. Lynde’s letters to Anne are full of Biblical allusions.

I forgot to tell you what happened the day the minister called here. It was the funniest thing I ever saw. I said to Marilla, `If Anne had been here wouldn’t she have had a laugh?’ Even Marilla laughed. You know he’s a very short, fat little man with bow legs. Well, that old pig of Mr. Harrison’s — the big, tall one — had wandered over here that day again and broke into the yard, and it got into the back porch, unbeknowns to us, and it was there when the minister appeared in the doorway. It made one wild bolt to get out, but there was nowhere to bolt to except between them bow legs. So there it went, and, being as it was so big and the minister so little, it took him clean off his feet and carried him away. His hat went one way and his cane another, just as Marilla and I got to the door. I’ll never forget the look of him. And that poor pig was near scared to death. I’ll never be able to read that account in the Bible of the swine that rushed madly down the steep place into the sea without seeing Mr. Harrison’s pig careering down the hill with that minister. I guess the pig thought he had the Old Boy on his back instead of inside of him. I was thankful the twins weren’t about. It wouldn’t have been the right thing for them to have seen a minister in such an undignified predicament. Just before they got to the brook the minister jumped off or fell off. The pig rushed through the brook like mad and up through the woods. Marilla and I run down and helped the minister get up and brush his coat. He wasn’t hurt, but he was mad. He seemed to hold Marilla and me responsible for it all, though we told him the pig didn’t belong to us, and had been pestering us all summer. Besides, what did he come to the back door for? You’d never have caught Mr. Allan doing that. It’ll be a long time before we get a man like Mr. Allan. But it’s an ill wind that blows no good. We’ve never seen hoof or hair of that pig since, and it’s my belief we never will.

-Anne of the Island ch.5

(”The swine that rushed madly down the steep place into the sea” is found in Matthew 8:28-34 and describes the story of men possessed with devils. It is also found in Luke 8:22-39. The passage from Matthew states the swine rushed into the “sea” and the passage from Luke states the swine rushed into the “lake.”)

Matthew 8:28-34
King James Bible

And when he was come to the other side into the country of the Gergesenes, there met him two possessed with devils, coming out of the tombs, exceeding fierce, so that no man might pass by that way. And, behold, they cried out, saying, What have we to do with thee, Jesus, thou Son of God? art thou come hither to torment us before the time? And there was a good way off from them an herd of many swine feeding. So the devils besought him, saying, If thou cast us out, suffer us to go away into the herd of swine. And he said unto them, Go. And when they were come out, they went into the herd of swine: and, behold, the whole herd of swine ran violently down a steep place into the sea, and perished in the waters. And they that kept them fled, and went their ways into the city, and told every thing, and what was befallen to the possessed of the devils. And, behold, the whole city came out to meet Jesus: and when they saw him, they besought him that he would depart out of their coasts.

Source

King James Bible