This essay is partly historical and partly philosophical in its orientation. Chapters I and 2 are more historical, chapters 3 and 4 are more philosophical. None is merely one or the other. Although my research on this theme began with the purpose of reconstructing a more accurate picture of the historical situation than was then available, in the present essay I have also tried to throw some light on the issues and problems with which the two philosophers, Husserl and Frege, were concerned. Since two major components of contemporary philosophy-phenomenology and analytic philosophy-are usually traced back to these two men, it is hoped that this essay will facilitate an understanding between those two components. In my view, the differences between them have been exaggerated. This study, I hope, will show that phenomenology and analytic philosophy started with common problems and concerns, and that there are distinct conceptual routes leading from one to the other. It also aims at suggesting how the philosophical insights derived from both can be fruitfully integrated to yield a rich theory of meaning and mental life.