Complex sentence: Letting out its rooms to a variety of occultists, scientists, artists, and writers, among them was L. Ron Hubbard, with whom he began the Babalon Working, a series of rituals designed to invoke the Thelemic goddess Babalon to Earth.
Split into simpler sentences: Letting out its rooms to a variety of occultists, scientists, artists, and writers. Among them was L. Ron Hubbard, with whom he began the Babalon Working, a series of rituals designed to invoke the Thelemic goddess Babalon to Earth.