Intelex Past Masters This link opens in a new windowInteLex Corporation's Past Masters series encompasses the largest collection of primary source full-text electronic editions in philosophy in the world. The library owns titles from the following collections: Conway: Writings and Letters; Ferguson: Correspondence; Continental Rationalists: Descartes, Leibniz, and Spinoza; Berkeley: Works; Bluestocking Feminism; and British Philosophy: 1600-1900.