What is the significance of the slaves’ vow to go to Africa if freed?

Read Chapters 4 and 5 and pay particular attention to the section called “VOICES: Boston Slaves Link Their Freedom to American Liberty” in Chapter 4. Once all reading is complete, respond to the following:

What is the object of this petition?
What Enlightenment principles does the petition invoke?
What is the significance of the slaves’ vow to go to Africa if freed?