A very good 1851 cover from London to Bilbao franked with a 10d embossed (inverted) and a 1d Red (imperf) lettered GE. Cancelled with 2x London Inland numerals and with a CALAIS CDS dated 21st November 1851. Red ‘PF’ in circle. M/s ‘Paid 10’. Back-stamped ‘DO/KO-20/1851’. Partial contents.