cover 1b, EG, small to very large margins, tied by black Cross to entire, originally sent from London to Leicester without adhesive and inscribed "Free" at lower-left, then re-addressed back to London with the 1d. affixed (over the top of Leicester d.s. of 5 June 1841) to pay the return postage; fine, attractive and a most unusual usage. R.P.S. Certificate (1973). Photo