In Britain, five people were vital for photography’s development: Anna Atkins, who made Photographs of British Algae (1843‒53), the first book to be illustrated entirely with photographs; Anne Dixon, who, with Atkins, co-produced Cyanotypes of British and Foreign Ferns (1853); William John Herschel, who worked to inject colour into the photographic process by experimenting with plant juices; Mary Somerville, who introduced Herschel to the idea; and William Henry Fox Talbot, whose The Pencil of Nature (1844) was the first commercial book to include photographic illustrations.