have been absurd to delay the publication of this volume for another year or more, on the chance of being able to go over the ground in some uncovenanted scrap of holiday. I have, as in previous cases, to make due acknowledgement of much kind help from friends in the completion of this piece of work. First and foremost my thanks are due to my Oxford colleague in the History School, Mr. C. T. Atkinson of Exeter College, who found time during some particularly busy weeks to go over my proofs with his accustomed accuracy. His criticism was always valuable, and I made numerous changes in the text in deference to his suggestions. As usual, his wonderful knowledge of British regimental history enabled me to correct many slips and solecisms, and to make many statements clearer by an alteration of words and phrases. I am filled with gratitude when I think how he exerted himself to help me in the midst his own absorbing duties. In the preceding volumes of this work I had not the advantage of being able to read the parts of the Hon. John Fortescue’s _History of the British Army_ which referred to the campaigns with which I was dealing. For down to 1914 I was some way ahead of him in the tale of years. But his volumes of 1921 took him past me, even as far as Waterloo, so that I had the opportunity of reading his accounts of Vittoria and the Pyrenees while I was writing my own version. This was always profitable--I am glad to think that we agree on all that is essential, though we may sometimes differ on matters of detail. But this is not the most important part of the aid that I owe to Mr. Fortescue. He was good enough to lend me the whole of his transcripts from the French Archives dealing with the Campaign of 1813, whereby I was saved a visit to Paris and much tedious copying of statistics and excerpting from dispatches. My own work at the _Archives Nationales_ and the Ministry of War had only taken me down to the end of 1812. This was a most friendly act, and saved me many hours of transcription. There are few authors who are so liberal and thoughtful for the benefit of their colleagues in study. It will be noted in the Appendix that quite a large proportion of my statistics come from papers lent me by Mr. Fortescue.