One of my contacts on Flickr is from Sarnia and collects old photos. After posting my Varnum photos, he found this photo of Elva, Violet and Daniel. After doing some searching at familysearch.org it turns out that their father Daniel is the brother of my grandmother's grandfather, Barrett Varnum.
http://www.flickr.com/photos/34370769@N07/3505113846/
For some reason Violet doesn't show up in the records at familysearch.org. My source for her birthday is this photo. She's the older girl with the baby on her lap.
