Everybody was willing. So Tom got out a sheet of paper that he had wrote the oath on, and read it. It swore every boy to stick to the band, and never tell any of the secrets; and if anybody done anything to any boy in the band, whichever boy was ordered to kill that person and his family must do it, and he musn’t eat and he musn’t sleep till he had killed them and hacked a cross in their breasts, which was the sign of the band. And nobody that didn’t belong to the band could use that mark, and if he did he must be sued; and if he done it again he must be killed. And if anybody that belonged to the band told the secrets, he must have his throat cut, and then have his carcass burnt up and the ashes scattered all around, and his name blotted off of the list with blood and never mentioned again by the gang, but have a curse put on it and be forgot, forever.
In Notebook #35, Mark Twain wrote: “In those old slave-holding days the whole community was agreed as to one thing–the awful sacredness of slave property. To help steal a horse or a cow was a low crime, but to help a hunted slave, or feed him or shelter him, or hide him, or comfort him, in his troubles, his terrors, his despair, or hesitate to promptly betray him to the slave-catcher when opportunity offered was a much baser crime, & carried with it a stain, a moral smirch which nothing could wipe away. That this sentiment should exist among slave-owners is comprehensible–there were good commercial reasons for it–but that it should exist & did exist among the paupers, the loafers the tag-rag & bobtail of the community, & in a passionate & uncompromising form, is not in our remote day realizable. It seemed natural enough to me then; natural enough that Huck & his father the worthless loafer should feel it & approve it, though it seems now absurd. It shows that that strange thing, the conscience–the unerring monitor–can be trained to approve any wild thing you want it to approve if you begin its education early & stick to it.”