1. Map of the river Sabine from its mouth on the Gulf of Mexico in the Sea to Logan's Ferry in latitude 31° .58'.24". north : shewing the boundary between the United States and the Republic of Texas between said points, as marked and laid down by Survey in 1840, under the direction of the Commissioners appointed for that purpose, under the 1st Article of the Convention signed at Washington April 25th 1838 Maps University Of Minnesota Public content 1840. Lee, Thomas Jefferson, 1808-1891. Depths shown by soundings.; Prime meridian: Greenwich.; Includes chart and text regarding latitude and longitude and a statement of the correctness... (Washn. [i.e. Washington, D.C).