Complex sentence: His third son Robert Morgan (1608--1673) in 1660 became Archdeacon of Merioneth in 1660 and was consecrated Bishop of Bangor in 1666.
Split into simpler sentences: His third son was Robert Morgan (1608--1673) who in 1660 became Archdeacon of Merioneth. He was consecrated Bishop of Bangor in 1666.