I couldn't help but note that Twain certainly mocks the Presbyterian version
(or what sounds a lot like what I remember) when he has Huck describe the
Grangerfords' discussion of the Sunday sermon, having "such a powerful lot
to say
about faith, and good works, and free grace, and preforeordestination, and I
don't know what all...."  This, in between bouts of blasting away at the
equally pious Shepherdsons.
Dan Walker