Since 1700 a number of prominent conchologists have published their studies of shells. John Mawe (1764–1829) produced arguably the first conchology guidebook, "The Voyager's Companion or Shell-Collector's Pilot", as well as "The Linnæan System of Conchology". Hugh Cuming (1791–1865) is famous for his huge collection and numerous discoveries of new species. Thomas Say wrote the fundamental work "American Conchology, or Descriptions of the Shells of North America, Illustrated From Coloured Figures From Original Drawings, Executed from Nature" in six volumes (1830–1834).