Eldredge Sisters

The three women in the photo are sisters, at least my grandmother always said they were. The woman at the far right is Anna Elizabeth (Eldredge) Slade born in 1829 and died in 1856, so we know the photo was taken before 1857. Anna's parents were Hezekiah and Fanny (Lacy) Eldredge, Anna's sisters were Fanny, Sarah, Helen, Celia and half sister Eunice, but we don't know which sisters are in the photo. Can anyone help identify them?

Can anyone help identify them?