History of english literature

Canto IX
In Russia. At the Imperial Russian court, the uniformed Don Juan is a dashing, handsome, and decorated soldier who readily impresses Empress Catherine the Great, who also is infatuated with and lustful for him. The Empress Catherine is a woman of forty eight-years who is "just now in juicy vigour". At court, Don Juan becomes one of her favourites, and is flattered by the sexual interest of the Empress, which earns him a promotion in rank; thus "Love is vanity, / Selfish in its beginning as its end, / Except where ’tis a mere insanity". Privately, Don Juan concerns himself with the health, education, and welfare of the Muslim girl he rescued at the siege of Izmail.
Canto X
Russian life. The cold clime of Russia makes Don Juan fall ill, so Empress Catherine sends him west-ward, to the warmer, temperate clime of England, accompanied by Leila. Ostensibly, Don Juan is a special envoy from the court of Imperial Russia with nebulous diplomatic responsibilities for negotiating a treaty between Russia and Britain. In fact, Don Juan's special-envoy job is a sinecure, by which Empress Catherine secures his health, his favour, and his finances.
Canto XI
In Britain. Having arrived to England, and then making his way to London, Don Juan muses upon the democratic greatness of Britain as defender of the freedoms of ordinary men — until interrupted by a menacing cockney footpad, a robber demanding either his money or his life. In self-defence, Don Juan shoots the footpad, but, as a man possessed of a strong conscience, he regrets his violent haste and tends the wound of the dying robber. Don Juan's medical effort fails and the robber mutters his last words and dies on the London street. Later, as an envoy of Russia, Don Juan is received at the English court, where the courtiers are in wonder of Juan's handsome visage, in admiration of his dress, and charmed by his mien and personality, which provoke the jealousy of some of the elder peers. In canto XI, Byron mentions John Keats (1795–1821) as a poet "who was kill'd off by one critique".