What is "Negroland" in the memoir, Negroland?

Negroland is Jefferson's word for the elite group of Negros who lived a “sheltered” life because of their privilege. It was a group of people rather than a place, and represented the people of her childhood. The adults of those families were professionals and relatively affluent. They exhibited good manners and good taste. They stood up for themselves, but through the courts and newspapers. The children attended the best schools and studied arts in order to become well-rounded adults.