struggling to survive on the lower rungs of the economic ladder and to encourage practical benevolence, but also to warn of the terrible danger to society created by the toleration of widespread ignorance and actual want among the poor. George Cruikshank, the illustrator who had earlier worked with Dickens on Sketches by Boz (1836) and Oliver Twist (1838), introduced him to the caricaturist John Leech. By 24 October Dickens invited Leech to work on A Christmas Carol, and four hand-coloured etchings and four black-and-white wood engravings by the artist accompanied the text. Dickens's hand-written manuscript of the story does not include the sentence in the penultimate paragraph "... and to Tiny Tim, who did not die"; this was added later, during the printing process. Characters The central character of A Christmas Carol is Ebenezer Scrooge, a miserly London-based businessman, described in the story as "a squeezing, wrenching, grasping, scraping, clutching, covetous old sinner!" Kelly writes that Scrooge may have been influenced by Dickens's conflicting feelings for his father, whom he both loved and demonised. This psychological conflict may be responsible for the two radically different Scrooges in the tale—one a cold, stingy and greedy semi-recluse, the other a benevolent, sociable man. The professor of English literature Robert Douglas-Fairhurst considers that in the opening part of the book covering young Scrooge's lonely and unhappy childhood, and his aspiration for money to avoid poverty "is something of a self-parody of Dickens's fears about himself"; the post-transformation parts of the book are how Dickens optimistically sees himself. Scrooge could also be based on two misers: the eccentric John Elwes, MP, or Jemmy Wood, the owner of the Gloucester Old Bank and also known as "The Gloucester Miser". According to the sociologist Frank W. Elwell, Scrooge's views on the poor are a reflection of those of the demographer and political economist Thomas Malthus, while the miser's questions "Are there no prisons? ... And the Union workhouses? ... The treadmill and the Poor Law are in full vigour, then?" are a reflection of a sarcastic question raised by the philosopher Thomas Carlyle, "Are there not treadmills, gibbets; even hospitals, poor-rates, New Poor-Law?" There are literary precursors for Scrooge in Dickens's own works. Peter Ackroyd, Dickens's biographer, sees similarities between the character and the elder Martin Chuzzlewit character, although the miser is "a more fantastic image" than the Chuzzlewit patriarch; Ackroyd observes that Chuzzlewit's transformation to