The Skeezers quickly recognized the three Adepts at Magic, whom they had learned to respect before their wicked Queen betrayed them, and welcomed them as friends. All the inhabitants of the village had been greatly frightened by their imprisonment under water, but now realized that an attempt was to be made to rescue them.

Glinda, the Wizard and the Adepts followed Ozma and Dorothy into the palace, and they asked Lady Aurex and Ervic to join them. After Ozma had told of her adventures in trying to prevent war between the Flatheads and the Skeezers, and Glinda had told all about the Rescue Expedition and the restoration of the three Adepts by the help of Ervic, a serious consultation was held as to how the island could be made to rise.

"I've tried every way in my power," said Ozma, "but Coo-ee-oh used a very unusual sort of magic which I do not understand. She seems to have prepared her witchcraft in such a way that a spoken word is necessary to accomplish her designs, and these spoken words are known only to herself."

"That is a method we taught her," declared Aurah the Adept.

"I can do no more, Glinda," continued Ozma, "so I wish you would try what your sorcery can accomplish."

"First, then," said Glinda, "let us visit the basement of the island, which I am told is underneath the village."

A flight of marble stairs led from one of Coo-ee-oh's private rooms down to the basement, but when the party arrived all were puzzled by what they saw. In the center of a broad, low room, stood a mass of great cog-wheels, chains and pulleys, all interlocked and seeming to form a huge machine; but there was no engine or other motive power to make the wheels turn.

"This, I suppose, is the means by which the island is lowered or raised," said Ozma, "but the magic word which is needed to move the machinery is unknown to us."

The three Adepts were carefully examining the mass of wheels, and soon the golden-haired one said:

"These wheels do not control the island at all. On the contrary, one set of them is used to open the doors of the little rooms where the submarines are kept, as may be seen from the chains and pulleys used. Each boat is kept in a little room with two doors, one to the basement room where we are now and the other letting into the lake.

"When Coo-ee-oh used the boat in which she attacked the Flatheads, she first commanded the basement door to open and with her followers she got into the boat and made the top close over them. Then the basement door being closed, the outer door was slowly opened, letting the water fill the room to float the boat, which then left the island, keeping under water."

"But how could she expect to get back again?" asked the Wizard.

"Why the boat would enter the room filled with water and after the outer door was closed a word of command started a pump which pumped all the water from the room. Then the boat would open and Coo-ee-oh could enter the basement."

"I see," said the Wizard. "It is a clever contrivance, but won't work unless one knows the magic words."

"Another part of this machinery," explained the white-haired Adept, "is used to extend the bridge from the island to the mainland. The steel bridge is in a room much like that in which the boats are kept, and at Coo-ce-oh's command it would reach out, joint by joint, until its far end touched the shore of the lake. The same magic command would make the bridge return to its former position. Of course the bridge could not be used unless the island was on the surface of the water."

"But how do you suppose Coo-ee-oh managed to sink the island, and make it rise again?" inquired Glinda.

This the Adepts could not yet explain. As nothing more could be learned from the basement they mounted the steps to the Queen's private suite again, and Ozma showed them to a special room where Coo-ee-oh kept her magical instruments and performed all her arts of witchcraft.

Many interesting things were to be seen in the Room of Magic, including much that had been stolen from the Adepts when they were transformed to fishes, but they had to admit that Coo-ee-oh had a rare genius for mechanics, and had used her knowledge in inventing a lot of mechanical apparatus that ordinary witches, wizards and sorcerers could not understand.

They all carefully inspected this room, taking care to examine every article they came across.

"The island," said Glinda thoughtfully, "rests on a base of solid marble. When it is submerged, as it is now, the base of the island is upon the bottom of the lake. What puzzles me is how such a great weight can be lifted and suspended in 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 she spoke.

"That we must now seriously consider," answered the Sorceress.

So all of them sat down in the Room of Magic and began to think. It was so still that after a while Dorothy grew nervous. The little girl never could keep silent for long, and at the risk of displeasing her magic-working friends she suddenly said:

"Well, Coo-ee-oh used just three magic words, one to make the bridge work, and one to make the submarines go out of their holes, and one to raise and lower the island. Three words. And Coo-ee-oh's name is made up of just three words. One is 'Coo,' and one is 'ee,' and one is 'oh.'"