 Other references to the work of Gómez Pereira can be found during the transition from the seventeenth to the eighteenth century, for example, in the Portuguese Jewish physician Isaac Cardoso, who edited his Philosophia libera in 1673. Here Pereira is placed on the same level as Vallés and Gassendi as a modern atomist who rejected the Aristotelian concept of prime matter. Even in Leibniz himself we can find traces of Pereira: in two letters dated on 1711 and 1713 he said he was looking for a copy of the Antoniana, and after having found it, he recognized that the thought of Descartes was not too different from that of Pereira. Leibniz believed, however, that the French philosopher had not read his work.