Map of the river Sabine from Logan's Ferry to 32nd degree of north latitude : shewing the boundary between the United States of America and the Republic of Texas between said points, as marked and laid down by survey in 1841, under the direction of the Joint Commission appointed for that purpose under the 1st article of the convention signed at Washington on the 25th day of April 1838

Part of the boundary between the United States and Texas, from Sabine River northward, to the 36th mile mound | Part of the boundary between the United States and Texas, north of Sabine River from the 39th [i.e. 36th] to the 72nd mile mound | Part of the boundary between the United States and Texas, north of Sabine River from the 72nd mile mound to Red River
Courtesy of Boston Public Library