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"Oh, it's de dad-blame' witches, sah, en I wisht I was dead, I do. Dey's awluz at it, sah, en dey do mos' kill me, dey sk'yers me so. Please to don't tell nobody 'bout it sah, er ole Mars Silas he'll scole me; 'kase he say dey AIN'T no witches. I jis' wish to goodness he was heah now – DEN what would he say! I jis' bet he couldn' fine no way to git aroun' it DIS time. But it's awluz jis' so; people dat's SOT, stays sot; dey won't look into noth'n'en fine it out f'r deyselves, en when YOU fine it out en tell um 'bout it, dey doan' b'lieve you." (34.78)
Just as the duke and king use religion to deceive the overzealous crowd, Tom and Huck use superstition to deceive Nat.
Jim only had time to grab us by the hand and squeeze it; then the nigger come back, and we said we'd come again some time if the nigger wanted us to; and he said he would, more particular if it was dark, because the witches went for him mostly in the dark, and it was good to have folks around then. (34.82)
The slave who feeds Jim shares Jim’s exaggerated superstitions.
And whilst we was a-standing there in the dimmish light, here comes a couple of the hounds bulging in from under Jim's bed; and they kept on piling in till there was eleven of them, and there warn't hardly room in there to get your breath. By jings, we forgot to fasten that lean-to door! The nigger Nat he only just hollered "Witches" once, and keeled over on to the floor amongst the dogs, and begun to groan like he was dying. Tom jerked the door open and flung out a slab of Jim's meat, and the dogs went for it, and in two seconds he was out himself and back again and shut the door, and I knowed he'd fixed the other door too. Then he went to work on the nigger, coaxing him and petting him, and asking him if he'd been imagining he saw something again. He raised up, and blinked his eyes around, and says:
"Mars Sid, you'll say I's a fool, but if I didn't b'lieve I see most a million dogs, er devils, er some'n, I wisht I may die right heah in dese tracks. I did, mos' sholy. Mars Sid, I FELT um – I FELT um, sah; dey was all over me. Dad fetch it, I jis' wisht I could git my han's on one er dem witches jis' wunst – on'y jis' wunst – it's all I'd ast. But mos'ly I wisht dey'd lemme 'lone, I does." (34.57, 34.58)
Tom takes advantage of Nat’s superstitions to cover up for his own mistake in trying to deceive him.