Don Juan continues to think about how peaceful and nice England is. He thinks this right up until a mugger confronts him and demands his money. Don Juan doesn't understand English, but he quickly figures out what's happening and shoots the guy with a pistol.
DJ immediately regrets his hasty action and tries to help the dying mugger. The mugger gives a quick speech before dying (basically the gist is: "I'm dying").
DJ feels bad for a moment and then moves on with his entourage. He meets some English people and Byron makes some satirical comments about how passionless the English are.
Despite their blandness, the English still fawn over DJ and his beauty. They're especially envious of a huge diamond that Catherine the Great gave him as a parting gift.
Byron takes a moment to talk about all the great English poets who came before him. Notice here that Byron implies that he is also a great English poet.
Don Juan spends his days hanging out with English dignitaries and going to fancy garden parties.