Possibly mentioned in a letter from Helen Matilda Webb Morgan to Frances Seward, December 22, 1859, "Aunt Louise sends her love." Catherine Louisa Webb was the sister of Helen's father, James Watson Webb. Both she and her niece, Catherine Louisa Webb Benton, seemed to have gone by "Louise" or "Louisa" from the context of the letter. There don't appear to be any other Aunts with a similar name.