A brief biography of Nathan W. Bush here.
Montgomery-Bush Cemetery on "Bush" land. Nathan's wife, Judith A (Thacker) Bush, "a citizen of the Republic of Texas," was buried there. According to FindAGrave, Nathan W. Bush (1812-1882) was buried at the Thomas Cochran Cemetery in Austin County, Texas.
First Settlers Of The Republic Of Texas, first published in 1840, included N.W. Bush:
Austin County - 2nd Class
BUSH, N. W., 640 March 16, 1838
From Republic Claims - Texas State Library and Archives Comm.:
Borden, John P. Bush, N. W. AU Unnumbered 01 122 545 662 102026
Borden, John P. Bush, N. W. AU Unnumbered 02 130 634 635 7215
In July 1853, William Gordon Bachman bought 320 acres from N. W. Bush in Austin County, Texas.
From The Portal To Texas History website, The Hempstead Courier published in Hempstead, Texas, Vol. 1, No. 1, Ed. 1 Wednesday, June 1, 1859: "When our esteemed fellow citizen Mr. N. W. Bush, was last in Sempronius.....".
From a lawsuit, Sorsy v. State, at Leagle.com: