site near Saratoga Springs, New York that is now also a National Historic Landmark, were originally organic. Later years After his work in New York, Hall extended his studies to other regions of the country. In 1850 Hall participated in a geological survey of northern Michigan and Wisconsin, where he identified the first fossil reefs ever found in North America. He was appointed state geologist for Iowa (1855–1858) and Wisconsin (1857–1860). In addition, several other state survey programs sought out Hall for his expertise and advice. In 1866 he was made director of the New York State Museum of Natural History in Albany. In 1893 he was appointed the State Geologist of New York. Between 1847 and 1894 Hall published 13 volumes of The Palaeontology of New York, his principal contribution in the field. This massive work consisted of over 4500 pages and 1000 full-page illustrations. In addition, Hall wrote more than 30 other books, published over 1000 works, and contributed sections to several federal and state publications on geology. He was a founding member of the National Academy of Sciences and the first president of the Geological Society of America. He was one of the founders of the International Geologic Congress and served as a vice-president at their sessions in Paris, Bologna, and Berlin. He was elected one of the fifty foreign members of the Geological Society of London in 1848, and in 1858 was awarded its Wollaston Medal. In 1884 he was elected correspondent of the French Academy of Sciences. At the age of 85 he traveled to St. Petersburg to attend the International Geological Congress and also participate in an expedition to the Ural Mountains. Hall died two years later in Bethlehem, New Hampshire. He is buried at the Albany Rural Cemetery, Albany, New York. A residence hall at Rensselaer Polytechnic Institute is named after James Hall. It is officially known as Hall Hall. Family In 1838 Hall married Sarah Aikin, the daughter of a Troy lawyer. They had two daughters and two sons. Sarah helped illustrate some of Hall's publications. In 1849 she published an illustrated book of poetry, Phantasia, and other poems. Included in this volume was her English translation of Schiller's Ritter Toggenburg. She died in 1895. Selected bibliography Geology of New York, Part IV (1843) Palaeontology of New York, 8 volumes (1847–1894). Geological Survey of Iowa, 2 volumes (1858–1859) Report on the Geological