James Johnson - Little New Info

I am trying to locate information on the first marriage of my grandfather, James Johnson. He was the son of Henry Johnson, a Danish immigrant, and Jane Gana, who were married in Lancaster County on 9-3-1873. His second wife was Virginia Catherine Rathe (nee Trusty), in Johnson County. They had 2 children, a daughter Nellie and my father, Walter who was born in 1925. My father's birth certificate says that He was James Johnson's eighth child. One of my father's half-sisters (daughter of Virginia and her first husband), told me that James had been married previously, and that she was institutionalized, and he had to wait for her to die to marry Virginia Trusty. I would like to know if anyone has info on his first wife and children.