Annie pulled and tugged at the loose stones; they were so heavy and cunningly arranged that she wondered how the little maid, who was smaller than herself, had managed to remove them. She saw quickly, however, that they were arranged with a certain leverage, and that the largest stone, that which formed the real entrance to the underground passage, was balanced in its place in such a fashion that when she leaned on a certain portion of it, it moved aside, and allowed plenty of room for her to go down into the earth.