(Revolutionary War) 1780 (Jul. 28) Savannah Ga. to North Britain, folded letter from a sailor recently arrived at Savannah, carried transatlantic possibly by warship, partial "Portsmouth / Ship Lre" two-line handstamp and manuscript rating, crossed out and updated to "In All 10", London "11/OC" bishop mark; address faded, some wear and cover tear, Fine. Estimate  $400 - 600. $0 (Image)