 Marty’s writings often contain very extensive polemics against his opponents and those of Brentano. Sometimes these polemics resulted in bitter animosity, as in his interchange with Christoph Sigwart (see e.g. Marty 1884 and Sigwart 1889). Sometimes Marty’s criticisms were received in good humor, as in the case of his very thorough-going and penetrating review of William James’ Principles of Psychology (Marty 1892b). Whatever effects Marty’s polemical style had on his contemporaries, the great misfortune from a present-day standpoint is that his own positive views become overshadowed by his criticisms of the views of others. With patience, however, it is possible to sift out from such criticisms his positive views on a number of philosophical issues. The extent to which these views are original cannot be fully assessed until Brentano’s literary remains are more adequately edited and published. Many of the views which were developed in his later work nonetheless diverged from Brentano’s earlier positions (as well as his own), but also from Brentano’s later positions.