To the Senate:
I herewith transmit, for the consideration of the Senate with a view to its ratification, a convention signed at Washington the 18th instant, between the United States and Mexico, to revive the provisions of the convention of July 29, 1882, to survey and relocate the existing boundary line between the two countries west of the Rio Grande, and to extend the time fixed in Article VIII of the said convention for the completion of the work in question.
Although the present convention fully explains the reasons for its negotiation, it may not be improper here to add that Article VII of the convention of July 29, 1882, stipulated that the said convention should continue in force until the completion of the work, "provided that such time does not exceed four years and four months from the date of the exchange of ratifications hereof."
The exchange of ratifications took place March 3, 1883, and the period within which the convention was in force ended July 3, 1887.
In order, therefore, to continue the provisions of the said convention of July 29, 1882, an additional article concluded at Washington December 5, 1885, further extended the time for the completion of the work for "eighteen months from the expiration of the term fixed in Article VIII of the said treaty of July 29, 1882," or until January 3, 1889.
As there was no further provision extending the said treaty of July 29, 1882, beyond that date, it expired by limitation. Hence the necessity for the convention of the 18th instant in its present form.
Grover Cleveland, Special Message Online by Gerhard Peters and John T. Woolley, The American Presidency Project https://www.presidency.ucsb.edu/node/205883