Jørgen Jørgensen was a Danish adventurer during the Age of Revolution. During the action of 2 March 1808, his ship was captured by the British. In 1809 he sailed to Iceland, declared the country independent from Denmark–Norway and pronounced himself its ruler. He intended to found a new republic, following the examples of the United States and the French First Republic. He was also a prolific writer of letters, papers, pamphlets and newspaper articles covering a wide variety of subjects, and for a period was an associate of the famous botanists Joseph Banks and William Jackson Hooker. He left over a hundred written autographs and drawings, most of which are collected in the British Library. Marcus Clarke referred to Jørgensen as "a singularly accomplished fortune wooer—one of the most interesting human comets recorded in history".

Sir William Jackson Hooker was an English botanist and botanical illustrator, who became the first director of Kew when in 1841 it was recommended to be placed under state ownership as a botanic garden. At Kew he founded the Herbarium and enlarged the gardens and arboretum. The standard author abbreviation Hook. is used to indicate this person as the author when citing a botanical name.