This work was begun many years ago. In 1908 I read in the British Museum many newspapers and journals for the years 1860-1865, and then planned a survey of English public opinion on the American Civil War. In the succeeding years as a teacher at Stanford University, California, the published diplomatic correspondence of Great Britain and of the United States were studied in connection with instruction given in the field of British-American relations. Several of my students prepared excellent theses on special topics and these have been acknowledged where used in this work. Many distractions and other writing prevented the completion of my original plan; and fortunately, for when in 1913 I had at last begun this work and had prepared three chapters, a letter was received from the late Charles Francis Adams inviting me to collaborate with him in preparing a "Life" of his father, the Charles Francis Adams who was American Minister to Great Britain during the Civil War. Mr. Adams had recently returned from England where he had given at Oxford University a series of lectures on the Civil War and had been so fortunate as to obtain copies, made under the scholarly supervision of Mr. Worthington C. Ford, of a great mass of correspondence from the Foreign Office files in the Public Record Office and from the private papers in the possession of various families.