San Marcos br/Hays County, Texas br/29 52.520' N 97 56.467' W br/br/Text: Local farmers Henry Kellerman, J.H. Barbee, A.H. Fleming, I. B. Rylander, and J. H. Williamson purchased this site in 1908. Through their efforts the farmers union gin company was established here under the leadership of Oscar Calvin Smith. The first industrial plant of its size in San Marcos, the gin became vital to the area's cotton industry and remained in operation until 1966. This brick gin house, built in 1911, replaced an earlier structure which burned.