Much that is set down here has been published before, but a good deal is new. My husband had written several articles in the Nineteenth Century, and by the kindness of the editor I have been able to make use of these; also I have incorporated the lectures he had given before the Royal Geographical Society and the British Association. The rest is from his note-books and from the 'Chronicles' that I always wrote during our journeys. I thought at first of trying to keep our several writings apart; but, to avoid confusion of inverted commas, I decided, acting on advice, just to put the whole thing into as consecutive a form as possible, only saying that the least part of the writing is mine. The bibliography is far from complete, as I can name only a few of the many books that my husband consulted on all the districts round those which we were going to penetrate