The present Edition of the History of the War in Afghanistan has been thoroughly revised; and several alterations have been made, which I hope may be fairly regarded also as emendations. Some of the notes have been abridged; and others, when the importance of their subject-matter seemed to warrant it, have been incorporated with the text. I have freely and gratefully availed myself of such information and such suggestions as have been furnished to me by others since the first appearance of the Work, whilst my own more recent historical and biographical researches have enabled me to illustrate more fully in some places my original conceptions, and in others to modify or to correct them. The material corrections, however, are not numerous. As almost every statement in the book was based upon copious documentary evidence, I have now, as regards my historical facts, very little to withdraw or to amend. I think I may, without unreasonable self-congratulation, assert that few works of contemporary history containing so large a body of facts have been so little questioned and controverted. The numerous communications, which I have received alike from friends and strangers, have contained little but confirmatory or illustrative matter; and, if they have cast any doubt upon the statements in the Work, it has been mainly on those advanced by the actors in the events described, and which therefore have appeared only in a dramatic sense in these pages. When, however, an opportunity _has_ been afforded me of placing before the reader any new facts, or counter-statements, which may possibly cause him to modify his previous opinions, I have always turned them to account. As I have no other object than that of declaring the truth, I cannot but rejoice in every added means of contributing to its completeness. In this present Edition, the History of the War in Afghanistan is divided into three Volumes. This is a change in the outer form of the Work, which may appear to be scarcely worthy of notice; but I believe it to be an improvement, and a suggestive one. I doubt whether there is a series of events in all history, which falls more naturally into three distinct groupes, giving the epic completeness of a beginning, a middle, and an end to the entire Work. It is true that some very generous and good-natured people have given me credit for the unity of design and of construction apparent in this; but in truth all the parts of the Work fell so naturally into their proper places, that there was little left for art to accomplish; and I am conscious that I owe to the nature of my subject the largest part of the praise which has been so encouragingly bestowed on myself.