January 31, 1840
To the Senate of the United States:
In compliance with two resolutions of the Senate, dated the 30th ultimo, calling for information in relation to the disputed boundary between the State of Missouri and the Territory of Iowa, I transmit a report from the Secretary of State, which, with inclosures, contains all the information in the executive department on the subject not already communicated to Congress.
M. VAN BUREN
Martin van Buren, Special Message Online by Gerhard Peters and John T. Woolley, The American Presidency Project https://www.presidency.ucsb.edu/node/200740