Boston Postal History, 1767-1800, group of 25 covers with mostly Boston straightline postmarks including many ship rating covers, better includes 1767 manuscript "Bo Sh" folded letter from Barbados to Newport R.I., 1772 with magenta "Boston" straightline to Bristol R.I. with additional partial strike of red Newport straightline, 1787 "Boston" straightline (BPM 86) to Philadelphia, 1794 "Boston" straightline and "Free" handstamp to Samuel Holten, Member of Congress at Philadelphia; 1797 folded letter from Coventry R.I. to Andover Mass. entering mails with partial "Hartford" two-line postmark, ms. "forwd." and "Boston" straightline, etc.; some mixed condition, F.-V.F. Estimate  $750 - 1,000. $0 (Image)