Extract from a Diary of Rear-Admiral Sir George Cockburn, with Particular Reference to Gen. Napoleon Buonaparte, on Passage from England to St. Helena, in 1815 on Board H.M.S. ‘Northumberland’. Napoleon’s Last Voyage.

The manuscript from which this extract has been printed, was found, in his handwriting, among the papers of my late father; attached to it being a note, also in his handwriting to the effect that it is a reproduction of a copy found at St. Helena, in 1824 or 25, among the effects of one who had held an official position as Admiral’s Secretary or Captain’s Clerk on board the “Northumberland“ on her voyage to St. Helena, where he died, and who had no doubt made it as a matter of pardonable curiosity and satisfaction for himself. Thos: Salkeld Borradaile, Surbiton 1888. [Preface].
Admiral Cockburn commander of HMS Northumberland, which conveyed Napoleon to his exile in St Helena, spent much time with Napoleon on the long voyage, and noted down their conversations in his diary.