French Colonies. (Senegal). 1870. Envelope written by the Captain of the Regiment at St Louis addressed to France bearing French General Colonies Yvert 4, 20c blue (imperf pair) tied by 'SNG' in lozenge with octagonal 'Corr. D. Armees/St Louis' in blue with boxed 'PD' and french entry cachet 'Col. Fr. Paq. Fr. 2 Bordeaux' in blue (Salles 1050) and arrival on reverse. Superb item of military mail paying the double military tariff.