Complex sentence: In 1902 he succeeded J. J. S. Perowne as Bishop of Worcester and in 1905 was installed as the first Bishop of Birmingham, a new see the creation of which (by dividing his see of Worcester) had been mainly due to his efforts.
Split into simpler sentences: In 1902 he succeeded J. J. S. Perowne as Bishop of Worcester. In 1905 he was installed as the first Bishop of Birmingham, a new see the creation of which (by dividing his see of Worcester) had been mainly due to his efforts.