Sally Staley,

Your "Spencer Willis" is mentioned in a Hunt County militia. He enrolled in Beat No. 2, Hunt County on July 6, 1861. Below is my "Spencer Willis" entry in my 150-page Name Index.
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WILLIS, Spencer A., b-1838 NC-killed before Aug 1867; m-Ruthy; 1860 Johnson Co TX cen p481; Burnet's 1st TX Sharpshooters, Co A (Hunt Co, TST), A-153
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If you have more info, such as Ruthy's maiden name, please let me know.
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Patti, prochette@Juno.com