"The third archway led to a very sizeable chamber entirely lined with shelves and having in the centre 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' above them, and all the Phalerons on the other, correspondingly labelled with a sign reading 'Materia'."

"Then he noticed a small door at the further end of the room, and calmed himself enough to approach it and examine the crude sign chiselled above. It was only a symbol, but it filled him with vague spiritual dread; for a morbid, dreaming friend of his had once drawn it on paper and told him a few of the things it means in the dark abyss of sleep. It was the sign of Koth, that dreamers see fixed above the archway of a certain black tower standing alone in twilight--and Willett did not like what his friend Randolph Carter had said of its powers." -- The Case of Charles Dexter Ward