Saumaise, C. de. De modo usurarum liber Leyden,

ex officina Elseviriorum (Bonaventura and Abraham Elzevier), 1639, (56),891,(93) p., cont. overlapping vellum w. (loosening/ torn) mor. letterpiece on spine (occas. imperfections).

First edition of this important book on interest. Willems, 488; Kress, 545; BMC, 697.