1772 entire letter from Landernau to London showing crowned "P" of Paris and "DE/14" Bishopmark, with fascinating contents commenting on the "expedition of de Kerguelen towards the Austral Parts", the fitting out of vessels at L'Orient for voyages to Mauritius and to Pondicherry and Bangal, and the loss of the "Jason", and Indiaman, on the coast of Loanda in Africa