| Levett Landen Boscawen Ibbetson Fossils, Engraved on a Daguerreotype Plate 1840 Print; Photomechanical Lithography National Museum of American History, Smithsonian Institution Id Number: GA.18907.02, Catalog Number: 18907.02 LL/126532 (Alan Griffiths, 18 March 2023) The Westminster Review, Vol. 34, Henry Hooper (publisher), London, between pp. 460-461
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