I was able to find Elmer in the 1910 census. Maybe you already have this, but he was living with August and Mathilda Kasten in Maine, Marathon Co. Wi. He is listed as George Panger age 2. It says he is a neice, which obviously was wrong. I was looking at some of your other posts and trees, and it seems like this would be the right boy living with his grandparents. I have several instances in my own research where a grandchild was listed as neice or nephew in that time frame. I hope that this helps.