the water, even by magic."

"I now remember," returned Aujah, "that one of the arts we taught
Coo-ee-oh was the way to expand steel, and I think that explains how
the island is raised and lowered. I noticed in the basement a big steel
pillar that passed through the floor and extended upward to this
palace. Perhaps the end of it is concealed in this very room. If the
lower end of the steel pillar is firmly embedded in the bottom of the
lake, Coo-ee-oh could utter a magic word that would make the pillar
expand, and so lift the entire island to the level of the water."

"I've found the end of the steel pillar. It's just here," announced the
Wizard, pointing to one side of the room where a great basin of
polished steel seemed to have been set upon the floor.

They all gathered around, and Ozma said:

"Yes, I am quite sure that is the upper end of the pillar that supports
the island. I noticed it when I first came here. It has been hollowed
out, you see, and something has been burned in the basin, for the fire
has left its marks. I wondered what was under the great basin and got
several of the Skeezers to come up here and try to lift it for me. They
were strong men, but could not move it at all."

"It seems to me," said Audah the Adept, "that we have discovered the
manner in which Coo-ee-oh raised the island. She would burn some sort
of magic powder in the basin, utter the magic word, and the pillar
would lengthen out and lift the island with it."

"What's this?" asked Dorothy, who had been searching around with the
others, and now noticed a slight hollow in the wall, near to where the
steel basin stood. As she spoke Dorothy pushed her thumb into the
hollow and instantly a small drawer popped out from the wall.

The three Adepts, Glinda and the Wizard sprang forward and peered into
the drawer. It was half filled with a grayish powder, the tiny grains
of which constantly moved as if impelled by some living force.

"It may be some kind of radium," said the Wizard.

"No," replied Glinda, "it is more wonderful than even radium, for I
recognize it as a rare mineral powder called Gaulau by the sorcerers. I
wonder how Coo-ee-oh discovered it and where she obtained it."

"There is no doubt," said Aujah the Adept, "that this is the magic
powder Coo-ee-oh burned in the basin. If only we knew the magic word, I
am quite sure we could raise the island."

"How can we discover the magic word?" asked Ozma, turning to Glinda as