and a thousand times worse hell when he began to drink.
"So he had to be killed. I was the only one left to protect her, for her mother was in league with Mark to bring about her ruin. I would have shot him openly for her sake, and with what gladness, but I had no mind to sacrifice myself needlessly. He was in my power; I could persuade him to almost anything by flattery; surely it would not be difficult to give his death the appearance of an accident.
"I need not take up your time by telling you of the many plans I made and rejected. For some days I inclined towards an unfortunate boating accident in the pond—Mark, a very indifferent swimmer, myself almost exhausted in a gallant attempt to hold him up. And then he himself gave me the idea, he and Miss Norris between them, and so put himself in my hands; without risk of discovery, I should have said, had you not discovered me.
"We were talking about ghosts. Mark had been even more vain, pompous and absurd than usual, and I could see that Miss Norris was irritated by it. After dinner she suggested dressing up as a ghost and frightening him. I thought it my duty to warn her that Mark took any joke against himself badly, but she was determined to do it. I gave way reluctantly. Reluctantly, also, I told her the secret of the passage. (There is an underground passage from the library to the bowling-green. You should exercise your ingenuity, Mr. Gillingham, in
