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Published online by Cambridge University Press: 01 August 2016
Over the years 1830-1832, there appeared three volumes of a mathematical textbook in Welsh Elfenau Rhifyddiaeth (the elements of arithmetic) by John William Thomas. The book has long been forgotten and apparently only one specimen now remains, in the Salesbury Library in the Cardiff College of the University of Wales. The treatment and subject matter of the work are in places surprising for that era, and it is worth bringing the contents of the book to light.