just found this post, all these years later, hope you are still active.
I would be interested in any info you may have about Pingree/Pengree McFerren. My great grandfather's name was Samuel Pingrey (variation on spelling?) McFerren, born abt 1853.
I have traced his line back through census records, but had been told that he was adopted. His middle name of "Pingree/Pengree/Pingrey" does not show up anywhere else in the family I have traced.
Perhaps he is in some way connected to your Pingree/Pengree McFerren.?
Any information is appreciated.