2607722 Portrait of Sir Joseph Dalton Hooker, 1851 (engraving) by Maguire, Thomas Herbert (1821-95) (after); Private Collection; (add.info.: Sir Joseph Dalton Hooker (1817 ??1911) was one of the greatest British botanists and explorers of the 19th century. Hooker was a founder of geographical botany, and Charles Darwin\'s closest friend. He was Director of the Royal Botanical Gardens, Kew, for twenty years, in succession to his father, William Jackson Hooker, and was awarded the highest honours of British science;); Prismatic Pictures ; English, out of copyright.