The tract appended to this preface has been chosen to accompany this reprint of Alton Locke in order to illustrate, from another side, a distinct period in the life of Charles Kingsley, which stands out very much by itself. It may be taken roughly to have extended from 1848 to 1856. It has been thought that they require a preface, and I have undertaken to write it, as one of the few survivors of those who were most intimately associated with the author at the time to which the works refer.