Thanks for the lookup offer in Bossier records. Wish my interests were there and not Caddo Kidding aside, no problem.
I wish I had been able to find the sisters but Artelie Baskin, Beulah Hefner, or Carrie Clay are not listed in the books. I found four Clay surnames in the books: Robbie Dual Clay, a child; Martha Jane Clay 1883-1961, Martha (no dates), and Will Clay d. Feb 17, 1918.
Wish I had been able to help. I know how frustrating the search can be!