I was at the Johnson Co., AR courthouse in Clarksville, AR yesterday. I found the following Cooper marriages. Isaac Cooper to Mary A. Roundtree 3-16-1875 pg. 358 James Cooper 40 yrs old to Elizabeth Gibbs 20 yrs. old. 3-18-1861. pg. 84. Silex Jackson Cooper 34 to Francis Snow 37 pg. 260. Hope this helps someone. Julia Cooper