I am looking for information about a Mertha Lyons born 1891 to Sarah Jane McCullough and Augustus Lyons when they lived in Oberlin, LA, which at the time was part of Calcasieu parish (now Allen Parish). Sarah Jane was my 3rd g.grandmother through her first husband, William Dowies. Augustus was her 3rd husband. Sarah's and Augustus's descendants live and lived all over Allen, Calcasieu, Vernon, Sabine and Beauregard parishes.
Mertha appears on the 1900 census and then disappears entirely. I am of the thought that Mertha may have been adopted by another family member after Augustus passed in 1902, but do not know.
Any help would be greatly appreciated!