YEALAND CONYERS - FIRST DAY OF THE PENNY BLACK COVER TO LONDON - 6 May 1840 EL to London paid '1' in cash with fine LANCASTER cds on the front and internally dated 6 May, scarce 'Yealand Conyers/ Penny Post' on the top flap and London tombstone receiver for 7 May also on the front. Cross Reference : LONDON POSTAL HISTORY (Image)