Good companion (Bonus socius) : XIIIth century manuscript collection of chess problems (1910)
Magee, James F. (James Francis), b. 1867, Biblioteca nazionale centrale di Firenze. Manuscript. Banco rari B.A. 6, p. 2, no. 1 · Florence : Printed by the Tipografia Giuntina · leaf 13
Jacobus, de Cessolis, fl. 1288-1322 · Philidor, F. D. (Francʹois Danican), 1726-1795 · La Bourdonnais, L. C. de (Louis Charles), 1796?-1840 · Chess problems
Internet Archive · Boston Public Library · Public domain (published before 1931). Free to use for anything.
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