To this period, too, must be assigned the composition of "Poltava," a work, the proper title of which would be "Mazepa," but which received its name in order that the public might not confound it with Byron's tale, the hero of both being the same historical personage. It is almost unnecessary to state that there is no resemblance whatever between these two remarkable works. While the production of Byron is rather an admirable development of certain incidents, either entirely invented by the poet, or only slightly suggested by passages of the old Kazak Hetman's biography, the _Mazepa_ of Pushkin is a most spirited and faithful version of the real history of the romantic life of the hero; the actual events adopted by the Russian poet as the groundwork of his tale, being certainly not inferior in strangeness, novelty, and romantic incident, to the short fiery tale, dawning rosily in mutual love, and finishing with the wild gallop on the desert steed, which thrills us so deeply in the pages of Byron. In 1829 was given to the world an edition of Pushkin's collected works, arranged in chronological order; and the author had another opportunity of visiting the East--those climes whence he had drawn, and was to draw again, so much of his inspiration. He once more crossed the Caucasus, and leaving in his rear his beloved Georgia, he followed the movements of the Russian army in its campaign, and accompanied it as far as Arzeram, receiving, during this journey, the most flattering attentions from Marshal Paskevitch, the commander-in-chief of the expedition. We may judge of the delight with which he seized this opportunity of indulging his taste for travelling, and of the vast store of recollections and images which he garnered up during this pilgrimage--so peculiarly attractive to a poet, as combining the pleasure of travelling with the splendour and picturesque novelties of a military march--by the letters in which he has described his impressions during this interesting period. These letters are models of simplicity, grace, and interest, and have become classical in the Russian language.