Egyptology's modern history begins with the invasion of Egypt by Napoleon Bonaparte in the late 18th century. The Rosetta Stone was discovered in 1799. The study of many aspects of ancient Egypt became more scientifically oriented with the publication of "Mémoires sur l'Égypte" in 1800 and the more comprehensive "Description de l'Egypte" between 1809 and 1829. These recorded Egyptian flora, fauna, and history—making numerous ancient Egyptian source materials available to Europeans for the first time. The British captured Egypt from the French and gained the Rosetta Stone in 1801, the Greek script of which was translated by 1803. In 1822, the respective Egyptian hieroglyphs were transliterated by Jean-François Champollion, marking the beginning of modern Egyptology. With increasing knowledge of Egyptian writing, the study of ancient Egypt was able to proceed with greater academic rigour. Champollion, Thomas Young and Ippolito Rosellini were some of the first Egyptologists of wide acclaim. The German Karl Richard Lepsius was an early participant in the investigations of Egypt—mapping, excavating and recording several sites.