Lalla or Belle

I thought I had finally figured out the daughters of Ann Walker Younger Croston, but now I'm not so sure.

If you look closely at these pictures from Gussie's scrapbook in each picture the same woman is labeled. (Gussie liked to write on pictures, convenient for her, but not so much if you'd like to see the picture.) In one photo she's labeled Lalla and in the next one, she's labeled Belle. I'll give you more information later, but there were three sisters, Henrietta, Lalla & Belle. Henrietta is the bride, but would anyone like to venture a guess as to which one's really Lalla.

Thanks. Susan