Pan Pickwick = Pickwick Papers

The Posthumous Papers of the Pickwick Club (also known as The Pickwick Papers) was Charles Dickens's first novel. He was asked to contribute to the project as an up-and-coming writer following the success of Sketches by Boz, published in 1836 (most of Dickens' novels were issued in shilling instalments before being published as complete volumes). Dickens (still writing under the pseudonym of Boz) increasingly took over the unsuccessful monthly publication after the original illustrator Robert Seymour had committed suicide.