The immediate purpose of this paper is the examination of a correspondence between two major philosophers which thus far has hardly been noticed, largely because it was practically inaccessible. I believe that it will add to our knowledge of both Brentano and Husserl and especially of their relationship. My own interest in this exchange goes back to my initial research on the beginnings of the Phenomenological Movement, where I found letters and exchanges one of the most important tools for my historical reconstructions. The Brentano-Husserl correspondence was no exception.