David you are right that many of the older members of the family must have suspected or known more than they were often willing to tell. I have worked since 1975 on several lines from the Potts Creek and Rich Patch areas of Alleghany County Virginia. Long before the internet my resources were limited. I was able to speak with a number of the oldest members of the community including some who had done their own research. The idea that there was nonwhite blood in the family always seemed to be an undercurrent when speaking in depth with most of these individuals. I assumed that it was due to Phoebe Persinger Craft and her father who I wrongly suspected at the time was Edward Hood. As time went on I came to believe that there was more to the story than anyone was willing to tell. Several did talk about there being Native Americans in the family but other than the fact that they knew Phoebe Persinger had Native American blood they had no idea how it came to be. When asking about the possibility of others in the family many would do as with you and go silent on me. I had one tell me when asking about Charlotte Humphries the grandaughter of Ruth "she never had her no (black) blood".I never thought much of it at the time except that it was an odd statement but now her reaction seems more understandable.