snorkle - I found this online. Not sure how accurate it is.
The Chinese first came to Texas, in two contingents, with the railroads. The first group, 250 contract laborers from California, arrived in January 1870 with the Houston and Texas Central, whose railhead was then at Calvert. Although their labor on the Houston-Dallas line was abruptly terminated after less than a year and most of them soon left the state, a few nevertheless remained in Robertson County. In 1880 these seventy-two were 53 percent of the 136 Chinese living in Texas. The second contingent, also from California, came in 1881 with the Southern Pacific, whose 3,000-person work force was, except for 400, all Chinese. When the line was completed in 1883, some of them, too, stayed in Texas. By 1890 the number of Chinese statewide had jumped to 710, of whom 225 (32 percent) were in El Paso County.