Published in English in 1884, this is the posthumous third edition of an 1862 study by the German orientalist Martin Haug (1827-76). He produced this groundbreaking analysis and comparison of Sanskrit and the Avesta while professor of Sanskrit at the Government College of Poona. His time in India enabled him to make an unprecedented study of Zoroastrian texts, becoming the first to translate the seventeen Gathas into a European language, thereby helping to highlight that they were composed by Zoroaster. Edward William West (1824-1905), an engineer and self-taught orientalist, met Haug in India. Having read this work's first edition, he was inspired to study further the Pahlavi language. On his and Haug's return to Europe in 1866, they worked closely together in translating and publishing Zoroastrian texts. West's edition of Haug's Essays includes several updates, unpublished papers from Haug's collection, appendices of further translations, and a biography of the author.