Thresor des monnoyes contenant plusieurs beaux et admirables secrets touchant la methode des alliages & essays, tant d'or que d'argent - R., M. (Par Iacques du Coq, 1624)
Also attributed to A. de Gourgues. Cf. Bourgeois & André, Sources de l'hist. de France 17me s., 7:282. - Dedication signed and dated (p. [9], 1st group): M.R., De Bourdeaus ce 24 feurier 1624. - Goldsmiths'-Kress no. 00552.4. - OCLC, 20888867. - Reproduction of original from Kress Library of Business and Economics, Harvard University