The Adventures of Tom Sawyer
"I don't want any marks. They always bury it [treasure] under a ha'nted house or on an island, or under a dead tree that's got one limb sticking out. Well, we've tried Jackson's Island a little, and we can try it again some time; and there's the old ha'nted house up the Still-House branch, and there's lots of deadlimb trees -- dead loads of 'em." (25.17)
"We can't ever tell the right time, and besides this kind of thing's too awful, here this time of night with witches and ghosts a-fluttering around so." (25.91)
"My! I never once thought of it, Huck!"
"Well, I didn't neither, but all at once it popped onto me that it was Friday."
"Blame it, a body can't be too careful, Huck. We might 'a' got into an awful scrape, tackling such a thing on a Friday."
"Might! Better say we would! There's some lucky days, maybe, but Friday ain't." (26.4-7)