Here's a picture of Sheba Sims Langford (Mama Sheba).
The four eldest are: Mary B Langford Hamrick (Aunt Mary, standing right), Joseph Casey "Jack" Langford (Uncle Jack, standing left), Maggie Lee Langford (Aunt Maggie, standing front), and George Bryan "Bill" Langford (Uncle Bill, seated). Uncle Bill looks to be only a few months old in this photo, so I have to guess that this photo was taken at the start of 1916. This would make Mama Sheba 31 years old, Aunt Mary 6, Uncle Jack 4, and Aunt Maggie 3.