Provided, That no part of this appropriation shall be used or expended until it shall be made satisfactorily to appear to the President of the United States that the southern boundary of New Mexico is not established by the commissioner and surveyor of the United States farther north of the town called “Paso” than the same is laid down in Disturnell’s map, which is added to the treaty.

My attention was drawn to this subject by a report from the Department of the Interior, which reviewed all the facts of the case and submitted for my decision the question whether under existing circumstances any part, of the appropriation could be lawfully used or expended for the further prosecution of the work.  After a careful consideration of the subject I came to the conclusion that it could not, and so informed the head of that Department.  Orders were immediately issued by him to the commissioner and surveyor to make no further requisitions on the Department, as they could not be paid, and to discontinue all operations on the southern line of New Mexico.  But as the Department had no exact information as to the amount of provisions and money which remained unexpended in the hands of the commissioner and surveyor, it was left discretionary with them to continue the survey down the Rio Grande as far as the means at their disposal would enable them or at once to disband the commission.  A special messenger has since arrived from the officer in charge of the survey on the river with information that the funds subject to his control were exhausted and that the officers and others employed in the service were destitute alike of the means of prosecuting the work and of returning to their homes.

The object of the proviso was doubtless to arrest the survey of the southern and western lines of New Mexico, in regard to which different opinions have been expressed; for it is hardly to be supposed that there could be any objection to that part of the line which extends along the channel of the Rio Grande.  But the terms of the law are so broad as to forbid the use of any part of the money for the prosecution of the work, or even for the payment to the officers and agents of the arrearages of pay which are justly due to them.

I earnestly invite your prompt attention to this subject, and recommend a modification of the terms of the proviso, so as to enable the Department to use as much of the appropriation as will be necessary to discharge the existing obligations of the Government and to complete the survey of the Rio Grande to its mouth.

It will also be proper to make further provision by law for the fulfillment of our treaty with Mexico for running and marking the residue of the boundary line between the two countries.

Permit me to invite your particular attention to the interests of the District of Columbia, which are confided by the Constitution to your peculiar care.

Among the measures which seem to me of the greatest importance to its prosperity are the introduction of a copious supply of water into the city of Washington and the construction of suitable bridges across the Potomac to replace those which were destroyed by high water in the early part of the present year.