President is thereby authorized to issue his proclamation declaring that
the foreign discriminating duties of tonnage and impost within the
United States are and shall be suspended and discontinued so far as
respects the vessels of the said foreign nation and the produce,
manufactures, or merchandise imported into the United States in the same
from the said foreign nation or from any other foreign country, the said
suspension to take effect from the time of such notification being given
to the President of the United States and to continue so long as the
reciprocal exemption of vessels belonging to citizens of the United
States and their cargoes as aforesaid shall be continued, and no longer;
and

Whereas satisfactory evidence has lately been received by me from His
Majesty the Emperor of Brazil, through an official communication of Mr.
Felippe José Pereira Leal, his chargé d'affaires in the United States,
under date of the 25th of October, 1847, that no other or higher duties
of tonnage and impost are imposed or levied in the ports of Brazil upon
vessels wholly belonging to citizens of the United States and upon the
produce, manufactures, or merchandise imported in the same from the
United States and from any foreign country whatever than are levied on
Brazilian ships and their cargoes in the same ports under like
circumstances:

Now, therefore, I, James K. Polk, President of the United States of
America, do hereby declare and proclaim that so much of the several acts
imposing discriminating duties of tonnage and impost within the United
States are and shall be suspended and discontinued so far as respects
the vessels of Brazil and the produce, manufactures, and merchandise
imported into the United States in the same from Brazil and from any
other foreign country whatever, the said suspension to take effect from