Troy & New York Steamboat, Black Boxed Handstamp on Cover with #11A 3c Dull Red and Manuscript "2" Due

The stamp with manuscript cancel, addressed to Mechanicville, Saratoga County, N.Y., struck with black boxed "TROY & NEW YORK / STEAM BOAT" marking. Additional manuscript "2" for ship fee, though the letter was prepaid.
The 2c due was added in pencil, despite the 1855 statute and postal regulations which only permitted the charge on letters where the postage had not been paid.

The boxed steamboat marking was introduced at Troy in 1856, making this an early example of this marking in use.