the Indian Post Office Act of 1837 provided that privately-owned ships were required to transport mail using designated postage rates; during the pre-adhesive period, a special handstamp was used until 1867. Up to 1867, the only British post office was located in the Crater District, which later was renamed as the Aden Cantonment or Aden Camp. The postage stamps of India were placed into use on 1 October 1867 at that post office. The Indian Post Office identified them as being used in Aden by the oblits assigned to the area: ‘124’ (4 varieties, including two being part of duplex cds’), ‘125’, ‘B-22’ (a duplex cds portion).