e of Representatives of the United States_:

Congress having suspended the appropriation, at the last session,
for the fortification at Dauphine Island, in consequence of a doubt
which was entertained of the propriety of that position, the further
prosecution of the work was suspended, and an order given, as intimated
in the message of the 3d of December, to the Board of Engineers and
Naval Commissioners to examine that part of the coast, and particularly
that position, as also the position at Mobile Point, with which it is
connected, and to report their opinion thereon, which has been done,
and which report is herewith communicated.

By this report it appears to be still the opinion of the Board that the
construction of works at both these positions is of great importance to
the defense of New Orleans and of all that portion of our Union which is
connected with and dependent on the Mississippi and on the other waters
which empty into the Gulf of Mexico between that river and Cape Florida.
That the subject may be fully before Congress, I transmit also a copy
of the former report of the Board, being that on which the work was
undertaken and has been in part executed. Approving as I do the opinion
of the Board, I consider it my duty to state the reasons on which I
adopted the first report, especially as they were in part suggested by
the occurrences of the late war.

The policy which induced Congress to decide on and provide for the
defense of the coast immediately after the war was founded on the marked
events of that interesting epoch. The vast body of men which it was
found necessary to call into the field through the whole extent of our
maritime frontier, and the number who perished by exposure, with the
immense expenditure of money and waste of property which followed, were
to be traced in an eminent degree to the defenseless condition of the
coast. It was to mitigate these evils in future wars, and even for the
higher purpose of preventing war itself, that the decision was formed to
make the coast, so far as it might be practicable, impregnable, and that
the measures necessary to that great object have been pursued with so
much zeal since.

It is known that no part of our Union is more exposed to invasion by the
numerous avenues leading to it, or more defenseless by the thinness of
the neighboring population, or offers a greater temptation to invasion,
either as a permanent acquisition or as a prize to the cupidi