Dickens, in his afterword to Our Mutual Friend, describes the fine balance (in a serialised novel!) of giving readers enough information to work out what was happening, but little enough that they thought they weren’t meant to. The trick of letting the audience feel smart without thinking the author foolish.
IN LIEU OF PREFACE.
When I devised this story, I foresaw the likelihood that a class of readers and commentators would suppose that I was at great pains to conceal exactly what I was at great pains to suggest: namely, that ******, and that ********. Pleasing myself with the idea that the supposition might in part arise out of some ingenuity in the story, and thinking it worth while, in the interests of art, to hint to an audience that an artist (of whatever denomination) may perhaps be trusted to know what he is about in his vocation, if they will concede him a little patience, I was not alarmed by the anticipation.
To keep for a long time unsuspected, yet always working itself out, another purpose originating in that leading incident, and turning it to a pleasant and useful account at last, was at once the most interesting and the most difficult part of my design. Its difficulty was much enhanced by the mode of publication; for, it would be very unreasonable to expect that many readers, pursuing a story in portions from month to month through nineteen months, will, until they have it before them complete, perceive the relations of its finer threads to the whole pattern which is always before the eyes of the story-weaver at his loom. Yet, that I hold the advantages of the mode of publication to outweigh its disadvantages, may be easily believed of one who revived it in the Pickwick Papers after long disuse, and has pursued it ever since.