10¢ Black (2), large margins all around, tiny negligible tear at bottom left, used on folded letter from Montreal, Canada, to New York City, letter datelined "Montreal 5th July 1848," carried by Lake Champlain Transportation Co. steamboat to post office at Whitehall, New York, where stamp was cancelled by bold "5" rate handstamp and tied by two strikes of "STEAM•BOAT" straightline handstamp, third full strike at left, letter concerns shipping salt from Turks Island and loading vessels with lumber for return, Very Fine, a remarkable cover carried by steamboat from Montreal to Whitehall on Lake Champlain--covers to Canada with "Steamboat" markings are very rare, but this is the only recorded cover from Canada, the Whitehall "STEAM• BOAT" used with the "5" rate handstamp is recorded on two other intra-U.S. 1848 stampless covers (PhilaMercury nos. 1584 and 27044), ex Wolcott, Sweet, Haas and Boker

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