John W Thomson was born 1805 in Louisa County, Virginia to parents William Russell Thomson (1771-Apr 22, 1861) of Orangeburg Co., South Carolina and Elizabeth Saab (27 June 1761-1838).. Grandparents were William Thomson Sr., of South Carolina (Jan. 16, 1727-Nov. 22, 1796) born in Pennsylvania, died in Sweet Springs, Allegheny, West Virginia, USA, and his wife Eugenia (Mary) Russell (1734-1809, Amelia, Calhoun, South Carolina.  
When he emigrated to Texas, his travels stopped by Tennessee. There he may have heard of enlisting at Nacogdoches colony and all who were going to accompany Davy Crockett.  John W arrived 1835 in Nacogdoches colony and joined the Volunteer Auxillary Corps of Texas known as (VAC) Nacogdoches Colony. Nacogdoches Muster List
He was part of Capt. William Gilmer's company, and accompanied the company as far as Washington-on-the-Brazos. Capt. Gilmer stopped there, but Thomson continued on toward San Antonio de Bexar with Davy Crockett.  There he joined the Defenders of the Alamo. 
John W arrived about Jan, 1836 in Bexar colony. John W put his medical training to use and served the Alamo as surgeon, treating the wounded in the Alamo hospital. John W Thomson was killed March 6, 1836 in the Battle of the Alamo. A memorial is in San Fernando Cathedral, San Antonio, Bexar, Texas.
Note: The file of John W Thompson contains a depostion given by his aunt, who testified that he was in Crockett's company. A second deposition is that given by Capt. William Gilmer. The Republic of Texas awarded heirs of John W Thomson: Bexar Bounty 1324 Acres in Frio co., Bexar 1st, 42.5 Acres in Frio co., Bexar Donation of 640 acres land unappropriated land (106 A in Concho co. and Tom Green co. and 252 1/2 acres by Special Act.  See one example which says by special act the Republic of Texas awarded heirs: GLO John W Thomson land Bounty, 1,223 1/2 acres
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