Ireland. (Spain). 1851. Stamp-less envelope written from Dublin dated '11th Sept 1851' addressed to Cadiz cancelled by Dublin circular 'Paid' , rated '1/8' in m/s and upgrated to '3/9' on face, endorsed 'via France' and routed via London with London/Paid transit, French entry cachet and oval 'P.F.' (Paid to Frontier) with '43.R' hand-struck charge on face in red and Cadiz receiver '22nd Sept' on reverse. Very nice cover from Ireland to France.