Calcuta Steam Letter marking on back to India. Letter mentions General Mcclellan

# 75 (Scott $490) tied by PAID grid to 1863 FL to India with BOSTON BR. PKT bkstp (ASCC $40) and boxed CALCUTTA STEAM LETTER ($400 Newman). Contents mentioning Gen McClellan ("a man innately slow") and alarm created by (Confed. Rider) "Alabama"; F-VF. R21.0