"You, Mr. de Marigny," he suddenly said to his learned host, "do not need to be told the particularly alien rhythm to which those cowled Shapes on the hexagonal pillars chanted and nodded. You are the only one else—in America—who has had a taste of the Outer Extension. That clock—I suppose it was sent you by the Yogi poor Harley Warren used to talk about—the seer who said that he alone of living men had been to Yian-Ho, the hidden legacy of eon-old Leng, and had borne certain things away from that dreadful and forbidden city. I wonder how many of its subtler properties you know? If my dreams and readings be corect, it was made by those who knew much of the First Gateway. But let me go on with my tale."