Complex sentence: In the seance Harris sat behind a curtain cabinet and in total eleven "spirit" figures came out from behind the curtain at different times dressed in different clothing, walked around the room, communicated with the sitters to then disappear behind the curtain.
Split into simpler sentences: In the seance Harris sat behind a curtain cabinet and in total eleven "spirit" figures came out from behind the curtain at different times dressed in different clothing. They walked around the room, communicated with the sitters to then disappear behind the curtain.