 Hattie repeatedly sang or hummed the song Wade in the Water. Harriet  Tubman sang this spiritual as a warning to runaway slaves. To  escaping slaves, the song told them to abandon the path and move  into the water. By traveling along the waters edge or across a body  of water, the slaves would throw chasing dogs and their keepers off  the scent. This song was better explained in a later episode of this  series.