A collection of 8 blue air letter cards. The cards are blue and have the words "PORT LINE LTD, 88 LEADENHALL STREET, LONDON EC3" is printed on the inside and outside of the letter card. The cards also has the words "AN AIR LETTER SHOULD NOT CONTAIN ANY ENCLOSURE , IF IT DOES IT WILL BE SUPERCHARGED OR SENT BY ORIGINAL MAIL, THE APSLEY AIR LETTER". printed towards the bottom. The letter comprises of three folded sections, one of which is blank. The second section contains the filled in address for the Port Line company. The third section has 5 lines and in the top left corner the words "BY AIRMAIL AIR LETTER, PAR AVION AEROGRAMME". AAB0627.7 has a rip on the right hand side of the card.