the Rio Grande; but inasmuch as his decision was clearly a departure
from the directions for tracing the boundary contained in that treaty,
and was not concurred in by the surveyor appointed on the part of the
United States, whose concurrence was necessary to give validity to that
decision, this Government is not concluded thereby; but that of Mexico
takes a different view of the subject.

There are also other questions of considerable magnitude pending between
the two Republics. Our minister in Mexico has ample instructions to
adjust them. Negotiations have been opened, but sufficient progress has
not been made therein to enable me to speak of the probable result.
Impressed with the importance of maintaining amicable relations with
that Republic and of yielding with liberality to all her just claims,
it is reasonable to expect that an arrangement mutually satisfactory to
both countries may be concluded and a lasting friendship between them
confirmed and perpetuated.

Congress having provided for a full mission to the States of Central
America, a minister was sent thither in July last. As yet he has had
time to visit only one of these States (Nicaragua), where he was
received in the most friendly manner. It is hoped that his presence and
good offices will have a benign effect in composing the dissensions
which prevail among them, and in establishing still more intimate and
friendly relations between them respectively and between each of them
and the United States.

Considering the vast regions of this continent and the number of states
which would be made accessible by the free navigation of the river
Amazon, particular attention has been given to this subject. Brazil,
through whose territories it passes into the ocean, has hitherto