Barbara, William Wallace Nivison who married Mary Olive Mason had 3 children, Vernon H (my great grandfather), Raymond and Ruth. They all moved to Washington state (Seattle area) around 1903. William died in 1907 and is buried in the G.A.R Cemetery in Seattle. William's father and mother were Nathan Nivison and Matilda (Mathilda) Kniffen. I am very interested in any information you have beyond that. I have heard that Nathan's father's name was John.