Complex sentence: Sumner received instead a royal chaplaincy and librarianship, and other preferments quickly followed until in 1826 he was consecrated Bishop of Llandaff and in 1827 Bishop of Winchester.
Split into simpler sentences: Sumner received instead a royal chaplaincy and librarianship. Other preferments quickly followed; in 1826 he was consecrated Bishop of Llandaff and in 1827 Bishop of Winchester.