Many Wilsons in the area that is now part of Portadown but were separate townlands at the time. Is he the Thomas Wilson living with wife Isabella in the 1900 Census in Manchester? Born November 1864, immigrated 1889, married 8 years, loom fixer by occupation? Children Ethel, Amanda, and No Name (daughter), born April 1900, aged 1 month? This suggests that they were married in the US.
By 1910, he and his two daughters, Ethel & Amanda, are still in Manchester, but his wife is not listed with him, altho' he is noted as married, and not widowed. In this census, it indicates he arrived in 1880. He is aged 45, so born about 1864/65 which is consistent. Given that year of birth, the immigration date of 1889 is likely closer to reality.