Who is Joshua (Josh) Lewis from The Glory Field and what is their importance?

Like his brother Moses and sister-in-law Saran, Joshua is also one of Old Master Lewis' slaves on Live Oaks. Joshua is born in 1821. He is four years older than Moses. Unlike Moses, however, Joshua has what Saran refers to as a "freedom dream" (31). According to Saran, a freedom dream is more of a waking realization which occurs to slaves out of the blue. Suddenly, a slave will be overcome by the desire to be as free as the birds.