"That is true," answered Ozma; "yet it is a clever arrangement to prevent their being surprised by intruders. Every time we reach the tenth step of a flight, the pressure of our feet on the stone makes a bell ring on top of the mountain, to warn the Flatheads of our coming." "How do you know that?" demanded Dorothy, astonished. "I've heard the bell ever since we started," Ozma told her. "You could not hear it, I know, but when I am holding my wand in my hand I can hear sounds a great distance off." "Do you hear anything on top of the mountain 'cept the bell?" inquired Dorothy. "Yes. The people are calling to one another in alarm and many footsteps are approaching the place where we will reach the flat top of the mountain." This made Dorothy feel somewhat anxious. "I'd thought we were going to visit just common, ordinary people," she remarked, "but they're pretty clever, it seems, and they know some kinds of magic, too. They may be dangerous, Ozma. P'raps we'd better stayed at home." Finally the upstairs-and-downstairs passage seemed coming to an end, for daylight again appeared ahead of the two girls and Ozma replaced her wand in the bosom of her gown. The last ten steps brought them to the surface, where they found themselves surrounded by such a throng of queer people that for a time they halted, speechless, and stared into the faces that confronted them. Dorothy knew at once why these mountain people were called Flatheads. Their heads were really flat on top, as if they had been cut off just above the eyes and ears. Also the heads were bald, with no hair on top at all, and the ears were big and stuck straight out, and the noses were small and stubby, while the mouths of the Flatheads were well shaped and not unusual. Their eyes were perhaps their best feature, being large and bright and a deep violet in color. The costumes of the Flatheads were all made of metals dug from their mountain. Small gold, silver, tin and iron discs, about the size of pennies, and very thin, were cleverly wired together and made to form knee trousers and jackets for the men and skirts and waists for the women. The colored metals were skillfully mixed to form stripes and checks of various sorts, so that the costumes were quite gorgeous and reminded Dorothy of pictures she had seen of Knights of old clothed in armor. Aside from their flat heads, these people were not really bad looking. The men were armed with bows and arrows and had small axes of steel stuck in their metal belts. They wore no hats nor ornaments. CHAPTER 6 Flathead Mountain When they saw that the intruders on their mountain were only two little girls, the Flatheads grunted with satisfaction and drew back, permitting them to see what the mountain top looked like. It was shaped like a saucer, so that the houses and other buildings--all made of rocks--could not be seen over the edge by anyone standing in the plain below.