Loose letter handed to Steamboat Letter Carrier at the dock in Boston, "EXPRESS MAIL BOSTON" October 30, 1855, 10¢ green 1855 Type III pays the treaty rate to Fredericton, New Brunswick. "UNITED STATES" 36mm circular exchange office marking.

Loose letter handed to Steamboat Letter Carrier at the dock in Boston, "U.S. EXPRESS MAIL BOSTON" September 17, 1857, unpaid letter rated 6[d] due to Kentville, Nova Scotia.

New York, New York, April 20, 1859, three 3¢ dull red Type III 1857s and 1¢ blue Type V 1857 pay the 10¢ treaty rate to Nova Scotia.  The cover was likely handed to the Steamboat Letter Carrier at the dock in Boston, "U.S. EXPRESS MAIL BOSTON" April 19, 1859 (date error).