seeing ghosts in "Song of Solomon"

The book "Song of Solomon" has a lot of supernatural features. From Pilates lack of a navel to Hagar's mysteriously failing to kill Milkman to characters seeing ghosts everywhere, there are a lot of references to the supernatural. Pilate and Macon see the ghost of their father, Macon 1, while in the woods. He leads them to the cave where they kill the white man. After they have split up, the ghost appears to Pilate and tells her not to leave the dead body so she goes back for it. She does not however have her father's dead body. This shows her being disconnected from her family in a way similar to her disconnect from not having a navel. Seeing ghosts is a strange thing and symbolizes the characters' connection to their past and their family. The supernatural in this book plays this role of connecting the past and the present in a way that real things cannot.