French Colonies. (British Post Office in Martinique). 1869. Stamp-less envelope written from St Pierre dated 'May 11th 1869' addressed to France cancelled by British Post Office 'Martinique' date stamp on reverse, sent on British steamer via London with boxed accountancy 'GB/1f60c' and London transit, Calais entry cachet and Nantes arrival, rated hand-struck '10'. Fine item from the British Post Office in Martinique.