Need some help finding a girl family descendants say was born into the Samuel and Elizabeth (Ralston) Waddell family on 21 Sep 1854 at Highland County Ohio. She doesn't appear with the family in the 1860 Highland County, Ohio Census as well as any thereafter in Douglas County, Illinois. Perhaps she died at an early age, though family says she lived to be married. This I'm beginning to doubt. I've checked online searches and cannot find her. What would my next step be short of sending for a birth certificate I'm not sure exists. Any help would be appreciated. Thanks in advance.