Third President of the Republic of Texas (1798–1859), in which capacity he served from 1838 to 1841. Among other accomplishments, Lamar secured recognition of Texas by several European countries and established the capital at Austin. Scarce ALS signed “Mirabeau B. Lamar, Sec’y of War,” one page, 7.75 x 9.75, May 18, 1836. Lamar writes to Col. Warren D. C. Hall, “Commandant of the Post Velasco.” In full: “I am directed by the President and Cabinet to say to you that in the event of any resistance to the decrees of the Court of this jurisdiction being offered by disorganizing and refractory individuals, you will, on application of the Sheriff, render him prompt and efficient aid in the execution of his duties and the maintenance of the Civil Authorities with any forces under your command.” In very good condition, with intersecting folds (vertical fold touching one letter of last name), mild wrinkling, tape repair to folds on reverse, and uniform overall toning. Pre-certified John Reznikoff/PSA/DNA and RRAuction COA.