Final answer:
The code name 'Moses' refers to Harriet Tubman in the biography being discussed, recognizing her role in leading enslaved individuals to freedom, much like the biblical Moses led the Hebrews out of Egypt.
Step-by-step explanation:
In the referenced biography, Moses is the code name that Harriet Tubman would use. Harriet Tubman, an escaped enslaved person herself, made numerous trips to the South to assist over three hundred other individuals seeking freedom via the Underground Railroad. This earned her the nickname "Moses," equating her to the biblical figure who led the Hebrews out of slavery in Egypt. Sarah H. Bradford's biography, Scenes in the Life of Harriet Tubman, portrays Tubman as a heroic figure with a level of bravery and endurance that ranks her alongside notable historic women like Joan of Arc and Florence Nightingale for her efforts in leading people to liberty.