Series 1. Essays and Lecture notes, 1907 - 1911

Includes: Psychology I. notebook of Costello from 1907 (Earlham College, undergraduate studies); handwritten seminar papers and essays from 1909-1911, titled ‘Some partly neglected aspects of the free-will controversy’, ‘External relations and the “argument from Missouri”’, ‘Individuality and value. A study of the relation of individuality to ethical means and ends’, ‘The nature of means and ends in ethics’, ‘The significance of the concept of relative efficiency’ [for J. Royce’s seminar] + various notes.