Complex sentence: The orphans go back to Lulu's tent to consult her, and discover the V.F.D. symbol on the outside, a secret archival library under the table hidden by a tablecloth and the mysterious effects behind her fortune telling are no more than ropes and pulleys.
Split into simpler sentences: The orphans go back to Lulu's tent to consult her. The mysterious effects behind her fortune telling turn out to be no more than ropes and pulleys.