sentences:  A few stations were stops at major plantations and although the volume of mail from these locations was very small, timely pick-up of this correspondence, much of it commercial, was deemed vital to the well being of the economy.The railway station clerk was responsible for cancelling the stamps on correspondence with a date-stamp.Each station already had its own date-stamp (used to validate passenger railway tickets); this same date-stamp was used to cancel stamps on mail.