1857, commercial folded entire to Bordeaux, endorsed on front "Par voie anglaise", tied with a fair strike of the blue circular handstamp "DIRECTION DE LA POSTE AUX LETTRES ST. LOUIS (SÉNÉGAL)", framed red "PD" and cds "COL. FR. AMB. CALAIS: M", reverse arrival receiver "BORDEAUX 12 AOUT 57", very fine and scarce early mail from Saint Louis (first post office established one year earlier)
