These volumes of Mill's letters have been awaited eagerly by all scholars in the field of nineteenth-century studies. They inaugurate most auspiciously the edition of the Collected Works of John Stuart Mill planned and directed by an editorial committee appointed from the Faculty of Arts and Science of the University of Toronto and from the University of Toronto Press.

In this collection of 537 letters and excerpts of letters are included all the personal letters available. It contains 238 hitherto unpublished letters and 72 letters with previously unpublished passages. Letters previously published have been recollated whenever possible. All are meticulously edited and annotated.