A new old photo-- found it in a cousin's Facebook albums with only a suggestion to the family name. I checked my genealogical database, and the number of children was right, the sex ratio (4 male, 7 female) was right, the apparent age range was right... yep, I was able to confirm the IDs and the year of the photo.
The last group photo I posted was from my mother's mother's father's side of the family-- this one is from my mother's mother's mother's side. The third girl from the right with her hands on the shoulders of the younger girl is my great-grandmother at the age of 15 in 1910, 2 years before she married my great-grandfather.
http://imageshack.us/photo/my-images...yenhansed.jpg/