difficulty. _ARCHDUKE JOHN OF AUSTRIA.London, November 18.Tho safety is reported of tho Arohduko John Salvator, of the Tuscan Branch of the House of Austria, who it was feared had been drowned whilo on a voyago to Valparaiso.Owing to a dispute with the Emperor of Austria the Archduke in November last renounced all his privilege* as* a member of the. Imperial Family and assumed tho name of John Orth.Jthertomano■a