Is Orville the grandson then of Alcinda (Rhodes) Turnipseed? If so, I am from Orville's Uncle, William Bryant Turnipseed's line.
I would be happy to share info. Received a photocopied document from a Library in Loudoun Co., VA listing a lot of Turnipseeds. Have other info, but it is all secondary info from searching the internet, so havent been able to verify all the sources.
Also, have you ever seen the book, "Sewing the Seed" or something along that name...it is an out-of-print book about the Rebsamen/Turnipseed line?