I have been studying this problems seriously for 7 or 8 years, since we found Gustavus's brothers (W.D. Tucker) graveyard just north of Danville. I had information from the internet that William Tucker's dad was Daniel. But now I don't believe it. I have been to Williams farm on the James River and talked to the descendent of Gustavus's sister Mary Burford. But he does not know either. Very frustrated. Need a break. I am descended from W.D. Tucker.