The song “Gold” features guest vocals by Dolly Parton and “Old Five and Dimers Like Me” is a duet between Harris and John Starling.
On her 2008 album All I Intended to Be, Emmylou Harris includes the song "How She Could Sing the Wildwood Flower", co-written with Kate and Anna McGarrigle, about the relationship between A.P. and Sara, inspired by a documentary that the three of them saw on television.