The Later Letters of John Stuart Mill 1849–1873

the present four volumes and the two volumes of Earlier Letters, published in 1963, constitute a collected edition of all the letters of John Stuart Mill available at this time. The separate publication of earlier and later letters, instead of the more usual multi-volume single publication of a whole collection all in one sequence and provided with one index, was dictated more by circumstances than by any inherent distinction between Mill’s earlier and later letters. The whole correspondence is the life of the man, “and above all the chief part of his life, his inner life.”