Lot
844 
Mexico, 1865, Eagle (4th Period), 1r blue, Pachuca, cons 167-1865, tied by "Pachuca, Oct 8, 1865" cds (Schatzkes 1120) on folded letter sheet to Mexico City, endorsed via "conducta de Don Juan Bustamente", Mexico receiving backstamp; cover soiling and edge wear, Fine, a rare over the battle lines usage. Scott No. 21 Estimate $400 - 600.
Since Pachuca was in French hands and Bustamente was the Republican Governor to the north, arrangements would have to have been made for the passage of the mail across the lines.