George Psalmanazar claimed to be the first Formosan to visit Europe. For some years he convinced many in Britain, but was later revealed to be an impostor. He later became a theological essayist and a friend and acquaintance of Samuel Johnson and other noted figures of 18th-century literary London. in 1704 Psalmanazar published a book entitled 'An Historical and Geographical Description of Formosa', an island subject to the Emperor of Japan which purported to be a detailed description of Formosan customs, geography and political economy, but which was in fact a complete invention on Psalmanazar's part. Psalmanazar's book also described the Formosan language and alphabet, which is significant for being an early example of a constructed language. His efforts in this regard were so convincing that German grammarians were including samples of his so-called 'Formosan alphabet' in books of languages well into the 18th century, even after his larger imposture had been exposed.