Context of Message from the President of the United States, in answer to a resolution of the Senate calling for correspondence in relation to taxation by the government of New Grenada on citizens of the United States when in transitu [i.e., transit] across the Isthmus of Panama, and also in relation to the mail service of the United States at the Isthmus. February 21, 1851. Ordered to lie on the table, and be printed.