September - November 1872: Twain's plan ..."was to travel through various parts of the British Isles to collect material for a book that would do for that country what Innocents Abroad had done for Europe and the Holy Land. A second objective was to secure a British copyright for Roughing It."
"He arrived in England in early September, and from that time until November 12, when he returned home, he was so frequently entertained by the literary and civic leaders of London that he scarcely had time for anything else."
Contrary to the impression given in "A Tramp Abroad", the European trip was a family excursion that included not only Clemens' wife, Livy, and daughters Susy (age six) and Clara (age four), but also Livy's friend Clara Spaulding and two servants, nursemaid Rosina Hay and butler George Griffin.
"The plan this time, however, was not to lecture, but to read from his books, and to include in his readings, all along the route, passages from the manuscript of Huckleberry Finn, which was scheduled to appear in February, immediately after the close of the lecture season."
"Two circumstances appear to have prompted the thought - the establishment of his own publishing house, the Charles L. Webster Company, a costly enterprise, and the forthcoming publication of The Adventures of Huckleberry Finn [sic]. "