Recent letter exchanges. Extension of Smith's journey to include Rome and Naples, where he has letter of introduction to Sir William Hamilton [(1731-1803)], ambassador to Naples. Warns Smith against taking a boat from Marseilles to Genoa or Genoa to Naples, for fear of shipwrecks, pirates, and quarantines. Introductions for Genoa and Milan. Warns against dangers of Vesuvius, subterranean journies, and extravagant pursuits of curiosity.