So great a thing as Pickwick is almost a kind of accident; it began as something secondary and grew into something primary and pre-eminent. It began with mere words written to illustrate somebody else’s pictures; and swelled like an epic expanded from an epigram. It might almost be said that in the case of Pickwick the author began as the servant of the artist. But, as in the same story of Pickwick, the servant became greater than the master.
— What I Saw In America (1921).