I'd like to nominate "Augustus Carp, Esq. - Being the Autobiography of a Really Good Man" by Henry Bashford.
It's available in the MR ebook section -
Patricia.
Library Journal - "Bashford's comic 1924 volume offers the mock autobiography of Augustus Carp, a self-aggrandizing, stuffy, puritanical oaf, who indulges in numerous vices in the name of Christianity, rationalizing his own weaknesses while condemning others for the same acts. Great fun."