1772 Philadelphia, Pa. to London England. 1772 transatlantic folded letter sheet to Thomas Penn (son of William Penn, founder of the Province of Pennsylvania), reverse with London "21 SE" Bishop mark, front with straight line "WATERFORD" postmark and matching "SHIP" handstamp, manuscript "1/9" rate, Very Fine. Estimate  $750 - 1,000. $0 (Image)