Talk:1851 Boundary Treaty (Brazil–Uruguay)

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From what I understood of this article it wasn't a set of treaties, but rather one treaty which actually made previous treaties about the boarder and water usage rights nul and void. Below is an excerpt from the US International Boundary Study No. 170 – November 23, 1979 pp 2

Brazil and Uruguay signed a boundary treaty on October 12, 1851, declaring null the various treaties on which territorial rights had been claimed, especially the Convention of Montevideo of January 30, 1819, and the Treaty of Incorporation of 1821. The treaty of 1851 delimited the Brazil - Uruguay boundary in greater detail than did the treaty of 1821 and modified it in places. All sectors of the 1851 treaty have now been superseded by subsequent treaties, except for the sector between the headwaters of the Arroio da Mina (Arroyo Mina) and the Uruguay river

As Im not 100% up on the history of this area maybe someone more knowledgeable than myself might like to look into this?