What a wonderful find.  While do some work with Ruth Filbert, I happen to find this in the 1918 Reno County Atlas.  The photo must have been taken around the summer of 1917.  In front of the house is Grandpa (with hands in pockets, just like I remembered him), standing in front of window is Beth, standing on porch is Speck (Preston) and Viola, below them are two kids ( Johnny and Vivian) then to right of them is Grandma, and she is holding Daddy (Edward).  Wow, and to think it was at the library all this time.
The house is on acreage that Grandpa owned just Northeast of Medora.