1751 MAIL USED WITHIN LONDON ST PAUL'S OFFICE DOCKWRA HAND STAMP TYPE 3 (L347). Fine large part letter from the 'White Swan Inn' dated 4th April 1751 'To Mr. Christopr Keys, In King Street near Golden Square', on reverse good strike St Paul's Office Dockwra hand stamp Type 3 (L347) with 'PAYD' at left within 'P/FR'. (Ref 124038).