First, I want to clarify something. Baby Felton was not living with Ethel's parents, but with her father, Henry Davis who was a widower. Apparently Annie, the second wife, had died by 1920. Malvena [the daughter] was living with her father and apparently was caring for her sister's baby. Rodney, the father, was living with his dad who was also a widower. With them was Thelma Gabriel, a granddaughter. She may have been helping out at the house for her uncle and grandpa. On the 1910 census, I found a Velerin/Velmon Gabriel living with her mother, Josephine Prosper, who was a widow. She was one and I think she was the same person as Thelma Gabriel who was eleven 10 years later. In 1900, Josephine was living with her aunt, Octavie Mitchell, who died 5/17/1943 @90. [volume 508, page 11]
Ethel would have been only eight when the 1910 census was taken. I don't think that she would not have been counted if she was a member of the household yet was not at home at the time the census taker was there. She evidently was living elswhere. Yet, I do not find her in 1910. She may have had another name. Or, she may have been in a hospital although I still should be able to find her since I think the census was taken of hospitals. Again, maybe not.
Yes, after I found that Ethel was Rodney's wife, I noticed that Felton had named one of his girls after his mother. By the way, I forgot to look for an obit for Felton, Sr. who died on 6/18/2009. I'll do that and let you know what I find.
I am still not finding anything on Sadie/Saddie and Anna Maurice. I, too, thought they may have been some realtion to Annie, the second wife. According to the 1910 census, Annie was born ca 1876 and she was not old enough to have a granddaughter who was born in 1901. So, the girls could not be step-granddaughters to Henry Davis. It is possible that Maurice was their mother's maiden name and that she did not marry their father who could have been one of the Davis boys.
I searched for the two girls using only their first names and ages. It was a possibility that they were living with relatives and that their names were written incorrectly. We know that Jessie and Arthur lived to be old, but I find nothing on them after 1910. I checked in other states, too. Oscar lived until at least 1910 and I found nothing definite on him. I don't find Social Security Death Records for Felton, Edgar, Houston, Oscar and Andrew. I do know that Andrew was alive in 1920. This is very strange. Either these men died young or they never paid social security. I was able to check the entire country.