Byron and Hobhouse left the Villa Diodati, October 5, 1816, crossed the Simplon, and made their way together, via Milan and Verona, to Venice. Early in December the friends parted company. Byron remained at Venice, and Hobhouse proceeded to Rome, and for the next four months devoted himself to the study of Italian literature, in connection with archæology and art. Byron testifies (September 14, 1817) that his researches were "indefatigable," that he had "more real knowledge of Rome and its environs than any Englishman who has been there since Gibbon." Hobhouse left Rome for Naples, May 21; returned to Rome, June 9; arrived at Terni, July 2; and early in July joined Byron on the Brenta, at La Mira. The latter half of the year (July--December, 1817) was occupied in consulting "the best authorities" in the Ducal Library at Venice, with a view to perfecting his researches, and giving them to the world as an illustrative appendix to _Childe Harold_. It is certain that Byron had begun the fourth canto, and written some thirty or more stanzas, before Hobhouse rejoined him at his villa of La Mira on the banks of the Brenta, in July, 1817; and it would seem that, although he had begun by saying "that he was too short a time in Rome for it," he speedily overcame his misgivings, and accomplished, as he believed, the last "fytte" of his pilgrimage. The first draft was Byron's unaided composition, but the "additional stanzas" were largely due to Hobhouse's suggestions in the course of conversation, if not to his written "researches." Hobhouse himself made no secret of it. In his preface (p. 5) to _Historical Illustrations_ he affirms that both "illustrations" and notes were "for the most part written while the noble author was yet employed in the composition of the poem. They were put into the hands of Lord Byron much in the state in which they now appear;" and, writing to Murray, December 7, 1817, he says, "I must confess I feel an affection for it [Canto IV.] more than ordinary, as part of it was begot as it were under my own eyes; for although your poets are as shy as elephants and camels ... yet I have, not unfrequently, witnessed his lordship's coupleting, and some of the stanzas owe their birth to our morning walk or evening ride at La Mira." Forty years later, in his revised and enlarged "Illustrations" (_Italy: Remarks made in Several Visits from the year 1816 to 1854_, by the Right Hon. Lord Broughton, G.C.B., 1859, i. p. iv.), he reverts to this collaboration: "When I rejoined Lord Byron at La Mira ... I found him employed upon the Fourth Canto of _Childe Harold_, and, later in the autumn, he showed me the first sketch of the poem. It was much shorter than it afterwards became, and it did not remark on several objects which appeared to me peculiarly worthy of notice. I made a list of these objects, and in conversation with him gave him reasons for the selection. The result was the poem as it now