I have exchanged info with a person named VanValkenburgh recently and our
lines crossed in Delaware County. I can't seem to find his Email address
at the moment, and I can't recall if I found him through this list. But I
think it was actually on the Genforum boards. He may have the info you
seek. If nobody else responds, I will turn my files upside down and see if
I can figure out where I put his Email address.
If there is a connection, we could be cousins!