Cartoon on The Penny Magazine, The Penny trumpeter! (title on object), The politician Henry Peter Brougham is depicted delivering The Penny Magazine. He is blowing a small trumpet and from his mouth comes a speech bubble. Behind him the office of the Society for the Diffusion of Useful Knowledge, built from books. Next to it a pile of old paper containing volumes of the Encyclopaedia Britannica. print maker: Charles Jameson Grant, (mentioned on object), publisher: Gabriel Shire Tregear, (mentioned on object), London, 20-Sep-1832, paper, height 442 mm x width 285 mm.