Blake returned to London in 1804 and began to write and illustrate "Jerusalem" (1804–20), his most ambitious work. Having conceived the idea of portraying the characters in Chaucer's "Canterbury Tales", Blake approached the dealer Robert Cromek, with a view to marketing an engraving. Knowing Blake was too eccentric to produce a popular work, Cromek promptly commissioned Blake's friend Thomas Stothard to execute the concept. When Blake learned he had been cheated, he broke off contact with Stothard. He set up an independent exhibition in his brother's haberdashery shop at 27 Broad Street in Soho. The exhibition was designed to market his own version of the Canterbury illustration (titled "The Canterbury Pilgrims"), along with other works. As a result, he wrote his "Descriptive Catalogue" (1809), which contains what Anthony Blunt called a "brilliant analysis" of Chaucer and is regularly anthologised as a classic of Chaucer criticism. It also contained detailed explanations of his other paintings. The exhibition was very poorly attended, selling none of the temperas or watercolours. Its only review, in "The Examiner", was hostile.