Warden, W. (1817). Letters written on board His Majesty's ship the Northumberland, and at Saint Helena: In which the conduct and conversations of Napolean Buonaparte, and his suite, during the voyage and the first months of his residence in that island, are faithfully described and related (2nd ed.). Parkin.

Warden, William. Letters Written on Board His Majesty's Ship the Northumberland, and at Saint Helena: In Which the Conduct and Conversations of Napolean Buonaparte, and His Suite, During the Voyage and the First Months of His Residence in That Island, Are Faithfully Described and Related. 2nd ed. Parkin, 1817.