The number of books published in the mid to late 19th century shows how interest in the natural world developed. Books on algae were written by: Isabella Gifford (1853) The Marine Botanist..., some of her specimens are in the Ulster Museum; D. Landsborough (c.1779–1854) A Popular History of British Seaweeds,... third edition published in 1857; Louisa Lane Clarke (c.1812–1883) The Common Seaweeds of the British Coast and Channel Islands;... in 1865; S.O.Gray (1828–1902) British Seaweeds:... published 1867 and W.H.Grattann British Marine Algae:...published about 1874. These books were for the common people.