The third archway led to a very sizeable chamber entirely lined with shelves and having in the center a table bearing two lamps. These lamps Willett lighted, and in their brilliant glow studied the endless shelving which surrounded him. Some of the upper levels were wholly vacant, but most of the space was filled with small odd-looking leaden jars of two general types; one tall and without handles like a Grecian lekythos or oil-jug, and the other with a single handle and proportioned like a Phaleron jug. All had metal stoppers, and were covered with peculiar-looking symbols moulded in low relief. In a moment the doctor noticed that these jugs were classified with great rigidity; all the lekythoi being on one side of the room with a large wooden sign reading “ Custodes