Richard Beard Patent: To Richard Beard. of Earl-street, Blackfriars, Gent., for improvements in the means of obtaining likenesses 1842, 10 March (sealed) 1843 (publication) Magazine page Google Books
Richard Beard Beard's Enamelled Daguerreotypes 1851, 7 June Magazine page The Courtauld Institute of Art Copyright: Illustrated London News Ltd. All rights reserved, Gale Document Number: HN3100028002