My father's parents were divorced when he was about 12 years old. He remained in contact with his father, but not his extended Whistler family. My father's career in the Air Force maintained the distance from this side of family for most of his life.
I certainly appreciate all the research you have done! If I can't get a direct response from this posting, I will pursue the leads.
However, my first choice is to find someone who has already confirmed that he is a Whistler via DNA testing. I don't mind paying for the test, but I would prefer to pay for someone with whom I have a high level of confidence of being a Whistler.
Based on all the documentation, a year ago I was very confident that I was a Whistler. Today, I certainly am NOT a benchmark for the Whistler line!