Arnold's daughter's name was Glene. She and her mother, Jean, changed their names and moved to a new city over thirty years ago. Unfortunately
, Glene passed away suddenly this past September. Her 87 year old mother is in an assisted living facility. I think Arnold walked out of their lives around 1947 or 1948. They never spoke of him. I was a good friend of his daughter, a gifted artist and writer, and while cleaning out her house found her marriage certificate ( she was divorced) with the Sluiter name on it and decided to do a search and do a family tree for her mom, also a friend. She still talks about flying planes in Fremont, Mi.
I hope this helps.