The Count of Monte Cristo

A rival Belfast edition from Simms and McIntyre, in their 'Parlour Novelist' series, began issuing volume one - titled Chateau d'If, translated by Emma Hardy - in April 1846, making it the first appearance in English of any part of the novel; however, that three-volume Belfast set was not completed until October 1846, after Chapman and Hall's complete two-volume London edition (finished by May 1846), so Chapman and Hall is generally cited as the first complete English edition.