cover 1821 (21 Feb.) entire letter to Somerset, rated "1/4" (deleted) and "1/7" and showing, on reverse, a largely fine strike of the very rare double-ring "Forwarded/By Y.O.H Servts/Goodwin Curling & Co/Deal......../AGENTS TO THE COMMITTEE OF LLOYD'S, RAMSGATE & DEAL" h.s., step-type "DEAL/SHIP LETTER" on face; believed to be unique. Photo