What might have been the course of the work from the point where it is broken off, is altogether matter of inference, beyond an indication of the subject of the chapter next to follow; but the remarks at the beginning of Chapter III. point to some likely conclusions. After the metaphysical discussions, which must have been prolonged through several chapters, there would probably have been taken in order the treatises De Coelo, De Generatione et Corruptione, the Meteorologica, and next the various Biological works; though with what detail in each case it is impossible to guess. Then must have followed the De Animâ with the minor Psychological treatises summed up as Parva Naturalia, and next, without doubt, the Ethica and Politica; last of all, the Rhetorica and Poetica. That Mr. Grote had carefully mastered all these works is evident from his marginal annotations in the various copies which he read. With the Ethica and Politica in particular he had early been familiar, and most there is reason to regret that he has left nothing worked out upon this field so specially his own.[1] Fortunately it happens that on the psychological field next adjoining there is something considerable to show. [Footnote 1: It has been already stated that two important Essays on these subjects have been discovered among Mr. Grote's posthumous papers since the publication of the First Edition. They are printed in this Edition after the chapter De Animâ.--Second Edition.] In the autumn of 1867 Mr. Grote undertook to write a short account of Aristotle's striking recognition of the physical aspect of mental phenomena, to be appended to the third edition of the senior editor's work, 'The Senses and the Intellect;' but, on following out the indications relative to that point, he was gradually led by his interest in the subject to elaborate a full abstract of the De Animâ and the other psychological treatises. Several months were spent on this task, and at the end he declared that it had greatly deepened his insight into Aristotle's philosophy as a whole. He also expressed his satisfaction at having thus completed an exposition of the Psychology, fitted to stand as his contribution to that part of Aristotle, in case he should never reach the subject in the regular course of his general work. The exposition was printed in full at the time (1868), and drew the attention of students. It is now reprinted, with the prominence due to its literary finish and intrinsic value, as a chapter--the last--in the body of the present work. The long Appendix coming after is composed of elements somewhat heterogeneous; but the different sections were all written in the period since 1865, and all, not excepting the last two (treating briefly of Epikurus and the Stoics), have a bearing upon the author's general design.