The interests and activities of John Stuart Mill (1806-73) were so wide-ranging that even the varied subjects of thirty previously published volumes of Collected Works cannot encompass them all. In this volume are brought together diverse and interesting instances of his polymathic career, none before republished and some previously unpublished. Neatly framing Mill's writing career are his editorial prefaces and extensive notes to Jeremy Bentham;s Rationale of Judicial Evidence (1827) and James Mill's Analysis of the Phenomena of the Human Mind (1869). Both demonstrate his extraordinary powers of mind and diligence as well as his fealty. His constant avocation, field botany, is shown in his botanical writings, which open a window on an almost unknown activity that sustained and delighted him. Brief comments on two medical works hint at another interest. Two articles of which he was co-author demonstrate his work as editor of the London and Westminster Review, and a calendar of his contributions to the Political Economy Club provides yet another glimpse into his chosen activities and concerns. Published for the first time are Mill's English and French wills, providing still further biographical detail.

Appearing just before his successful parliamentary candidature, the Examination, with its deliberate and explicit onslaught on the intuitionists who were, in Mill's view, allied with anti-progressive political and religious forces, brought his beliefs into the public arena in a new way. Some of those who supported him politically found themselves viciously attacked because they had associated themselves with one who assailed settled religious beliefs. Other religionists who rejected many of Mill's attitudes strong expressed their admiration of the Examination because of its exposure to what they, with him, saw as dangerous theological and moral positions.

Alan Ryan's analytical and historial introduction dwells on the most significant philosophical elements in the work, placing them in perspective and showing their relations to other aspects of Mill's thought. The textual introduction, by John M. Robson, examines the treatise in context of Mill's life in the 1860s, outlines its composition, and discusses, among other matters, the importance of the extensive revisions Mill made, mostly in response to critics. These revisions appear in full in the textual apparatus. Also provided are a bibliographical index, which gives a guide to the literature on the subject, and a collation of Mill's quotations, an analytical index, and appendices giving the reading of manuscript fragments and listing textual emendations.