As to other sources now first utilized in print, I have to thank Mr. W. S. D’Urban of Newport House for the loan of the diary of his ancestor Sir Benjamin D’Urban--most valuable for the Burgos retreat, especially for the operations of Hill’s column. Another diary and correspondence, which was all-important for my last volume, runs dry as a source after the first months of 1813. These were the papers of Sir George Scovell, Wellington’s cypher-secretary, from which so many quotations may be found in volume V. But after he left head-quarters and took charge of the newly formed Military Police [‘Staff Corps Cavalry’] in the spring before Vittoria, he lost touch with the lines of information on which he had hitherto been so valuable. I owe the very useful reports of the Spanish Fourth Army, and the Marching Orders of General Giron, to the kindness of Colonel Juan Arzadun, who caused them to be typed and sent to me from Madrid. By their aid I was able to fill up all the daily _étapes_ of the Galician corps, and to throw some new light on its operations in Biscay. To Mr. Leonard Atkinson, M.C., of the Record Office, I must give a special word of acknowledgement, which I repeat on page 753, for discovering the long-lost ‘morning states’ of Wellington’s army in 1813, which his thorough acquaintance with the shelves of his department enabled him to find for me, after they had been divorced for at least three generations from the dispatches to which they had originally belonged. Tied up unbound between two pieces of cardboard, they had eluded all previous seekers. We can at last give accurately the strength of every British and Portuguese brigade at Vittoria and in the Pyrenees. I could have wished that the times permitted authors to be as liberal with maps as they were before the advent of post-war prices. I would gladly have added detailed plans of the combats of Venta del Pozo and Tolosa to my illustrations. And I am sorry that for maps of Tarragona, and Catalonia generally, I must refer readers back to my fourth volume. But books of research have now to be equipped with the lowest possible minimum of plates, or their price becomes prohibitive. I do not think that anything really essential for the understanding of localities has been left out. I ought perhaps to mention that my reconstructions of the topography of Maya and Roncesvalles owe much to the sketch-maps in General Beatson’s _Wellington in the Pyrenees_, the only modern plans which have any value. To conclude, I must express, now for the sixth time, to the compiler of the Index my heartfelt gratitude for a laborious task executed with her usual untiring patience and thoroughness. CHARLES OMAN. OXFORD, _June_ 1922. CONTENTS SECTION XXXIV THE BURGOS CAMPAIGN CHAPTER PAGE I. Wellington in the North: Burgos Invested. September 1812 1 II. The Siege of Burgos. September 19-October 30, 1812 21