Overview Charles Alexandre Lesueur, 1778-1846, artist and naturalist, participated in Napoleon's expedition to Australia (1800-1804), and joined William Maclure in his geologic survey of Europe, the West Indies and the Eastern United States (1815-1817). Upon returning to Philadelphia, Lesueur and Maclure wrote out the results of their travels, publishing many scientific papers in the Journal of the Academy of Natural Sciences of Philadelphia, with Lesueur also publishing findings from his Australian...