WASHINGTON, _May 30, 1834_.

_To the Senate of the United States_:

It having been represented to me by persons whose statements and
opinions were thought worthy of confidence that the trade of the United
States might be extended and rendered more lucrative by commercial
arrangements with the countries bordering on the Indian Ocean, and
being informed that the success of any efforts which might be made to
accomplish that object would materially depend upon the secrecy with
which they should be conducted, I appointed Mr. Edmund Roberts a special
agent of this Government for the purpose of visiting those seas and
concluding such commercial conventions as might have the effect of
securing additional advantages to our trade in that quarter. This agency
has resulted in the conclusion of treaties with the King of Siam and
the Sultan of Muscat, whereby the commerce of the United States with
the countries subject to the dominion of those princes, which had been
previously embarrassed by serious disadvantages and obstructions, is
placed upon a footing with that of the most favored nation. These
treaties, the former of which was signed at the city of Siayuthia
(commonly called Bankok) on the 20th day of March, 1833, and the latter
at the city of Muscat on the 21st day of September of the same year,
are submitted to the Senate for their consideration and advice.

I transmit a copy of the instructions which were given to the special
agent and a communication made by him to the Secretary of State,
containing particular and important information respecting the countries
with which these treaties have been concluded. The expenses of the