New York, December 24.—The Heralds To ronto special says an agent of our Post-office Department and the United States Consul in Toronto have recently found in Dond, in the custom-house in that city, ten thousand dol lars' worth of United States three-cent letter stamps, part of a consignment to a house here by the Confederate agent in Liverpool. Our Government received information in August last, and an injunction on the stamps has been gotten out, and the question of their