Who is Charles Emerson from Emerson: The Mind on Fire: A Biography and what is their importance?

Born in 1808, Charles Emerson was the youngest of the brothers. He was described as bright and endearing, as well as Aunt Mary Moody Emerson's favorite. Charles is saud to have had a dark side, an ambitious desire for eminence and greatness. In 1836, Charles' health, which was never good, took a turn for the worse. He died four months before his wedding.