Complex sentence: During the next four years Donne fell in love with Egerton's niece Anne More, and they were secretly married just before Christmas in 1601, against the wishes of both Egerton and George More, who was Lieutenant of the Tower and Anne's father.
Split into simpler sentences: During the next four years, he fell in love with Egerton's niece Anne More. They were married just before Christmas in 1601, against the wishes of both Egerton and George More, who was Lieutenant of the Tower and Anne's father.