Complex sentence: In 1903, Arthur Edward Waite and Blackden joined forces to retain the name Isis-Urania, appointing Rev. W.A. Ayton as their Third Chief, and after Aytons death, Col. Webber took his place.
Split into simpler sentences: In 1903, Arthur Edward Waite and Blackden joined forces to retain the name Isis-Urania, appointing Rev. W.A. Ayton as their third Chief. After Aytons death, Col. Webber took his place.