Complex sentence: She married George Child-Villiers, 5th Earl of Jersey in 1804, and upon her majority in 1806, she became senior partner, and exercised her rights personally until her death in 1867.
Split into simpler sentences: She married George Child-Villiers, 5th Earl of Jersey in 1804, and upon her majority in 1806 she became senior partner. She exercised her rights personally until her death in 1867.