The Everitt family has been extensively researched by Jeff Harmon. He has a great website at http://freepages.family.rootsweb.ancestry.com/~tashpage/ever...
If you poke around on there, you'll find family trees, family photos, all kinds of great stuff. I'm sure he'd be interested in trying to help you identify your mystery photos. My grandmother and her youngest sister are still living. They are your grandmother's half sisters. They are the only ones of that generation left. They might be of some help with your mystery photos too.
Your great grandmother was William Everitt's first wife Laura Talbott, and my great-grandmother was his second wife, Lula Hardy. There's a lovely picture of William and Laura on Jeff's website. I've got an original of it in my dining room. I have a collection of letters that William and Laura wrote to each other while they were courting. They are posted online at http://www.rootsweb.ancestry.com/~inscott/EverittIndex.html
There's going to be an Everitt family reunion later this summer in Scottsburg. There is probably information about it on Jeff's website too. If you contact me directly at Michelle_L_Knight@hotmail.com
, we can share more information.