POSTAL HISTORY: 1948 (Jan 30) commercial usage of formular aerogramme to Canada with KGVI 6d tied by 'ST HELENA' cds. Interesting message: "...Am sending this airmail & shall be interested to know how long it takes in transit...". Notation "R 20-2-48" indicates transit time was three weeks presumably because the outgoing mail was by ship, to South Africa or England, only then by air.