1807 (26.5.), entire folded letter with red "No20 GRANDE ARMEE" from Breslau sent to WARSAW addressed to Lauberdiere Général de brigade en service de S.M. l´Empereur des francais á Warsowie, with red debourse "No65 DEB. GRANDE ARMEE" applied at arrival in WARSAW. Very fine condition and EXTREMELY RARE FRENCH FIELD POST DÉBOURSÉ COVER FROM WARSAW / POLAND. (Tax Method: Margin System)