Ritchie, Joseph (ca. 1788-1819). Interesting Autograph Letter to John Whishaw, Secretary of the African Institution, Written at the Beginning of Ritchie's Ill-Fated Expedition to Africa, to Introduce Sidi Hassuna D'Ghies, who was a son of the Prime Minister of the Pasha of Tripoli, and Later Would Become the Pasha's Foreign Minister, and Additionally he was Later also Connected to the Fate of Alexander Laing. Marseilles: 28 August 1818.