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

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

"The island," said Glinda thoughtfully, "rests on abase of solid marble. When it is submerged, as it isnow, the base of the island is upon the bottom of thelake. What puzzles me is how such a great weight can belifted and suspended in the water, even by magic."

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

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

They all gathered around, and Ozma said:

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

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

"What's this?" asked Dorothy, who had been searchingaround with the others, and now noticed a slight hollowin the wall, near to where the steel basin stood. Asshe spoke Dorothy pushed her thumb into the hollow andinstantly a small drawer popped out from the wall.

The three Adepts, Glinda and the Wizard sprangforward and peered into the drawer. It was half filledwith a grayish powder, the tiny grains of whichconstantly 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 evenradium, for I recognize it as a rare mineral powdercalled Gaulau by the sorcerers. I wonder how Coo-ee-ohdiscovered it and where she obtained it."

"There is no doubt," said Aujah the Adept, "that thisis the magic powder Coo-ee-oh burned in the basin. Ifonly we knew the magic word, I am quite sure we couldraise the island."

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

"That we must now seriously consider," answered theSorceress.

So all of them sat down in the Room of Magic andbegan to think. It was so still that after a whileDorothy grew nervous. The little girl never could keepsilent for long, and at the risk of displeasing hermagic-working friends she suddenly said:

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

The Wizard frowned but Glinda looked wonderingly atthe young girl and Ozma cried out:

"A good thought, Dorothy dear! You may have solvedour problem."

"I believe it is worth a trial," agreed Glinda. "Itwould be quite natural for Coo-ee-oh to divide hername into three magic syllables, and Dorothy'ssuggestion seems like an inspiration."

The three Adepts also approved the trial but thebrown-haired one said:

"We must be careful not to use the wrong word, andsend the bridge out under water. The main thing, ifDorothy's idea is correct, is to hit upon the one wordthat moves the island."

"Let us experiment," suggested the Wizard.

In the drawer with the moving gray powder was a tinygolden cup, which they thought was used for measuring.Glinda filled this cup with the powder and carefullypoured it into the shallow basin, which was the top ofthe great steel pillar supporting the island. ThenAurah the Adept lighted a taper and touched it to thepowder, which instantly glowed fiery red and tumbledabout the basin with astonishing energy. While thegrains of powder still glowed red the Sorceress bentover it and said in a voice of command: "Coo!"

They waited motionless to see what would happen.There was a grating noise and a whirl of machinery, butthe island did not move a particle.

Dorothy rushed to the window, which overlookedthe glass side of the dome.

"The boats!" she exclaimed. "The boats are allloose an' sailing under water."

"We've made a mistake," said the Wizard gloomily.

"But it's one which shows we are on the right track,"declared Aujah the Adept. "We know now that Coo-ee-ohused the syllables of her name for the magic words."

"If 'Coo' sends out the boats, it is probable thatee' works the bridge," suggested Ozma. "So the lastpart of the name may raise the island."

"Let us try that next then," proposed the Wizard.

He scraped the embers of the burned powder out of thebasin and Glinda again filled the golden cup from thedrawer and placed it on top the steel pillar. Aurahlighted it with her taper and Ozma bent over the basinand murmured the long drawn syllable: "Oh-h-h!"

Instantly the island trembled and with a weirdgroaning noise it moved upward -- slowly, very slowly,but with a steady motion, while all the company stoodby in awed silence. It was a wonderful thing, even tothose skilled in the arts of magic, wizardry andsorcery, to realize that a single word could raise thatgreat, heavy island, with its immense glass Dome.

"Why, we're way above the lake now!" exclaimedDorothy from the window, when at last the island ceasedto move.

"That is because we lowered the level of the water,"explained Glinda.

They could hear the Skeezers cheering lustily in thestreets of the village as they realized that they weresaved.

"Come," said Ozma eagerly, "let us go down and jointhe people."

"Not just yet," returned Glinda, a happy smile uponher lovely face, for she was overjoyed at theirsuccess. "First let us extend the bridge to themainland, where our friends from the Emerald City arewaiting."

It didn't take long to put more powder in the basin,light it and utter the syllable "EE!" The result wasthat a door in the basement opened and the steel bridgemoved out, extended itself joint by joint, and finallyrested its far end on the shore of the lake just infront of the encampment.

"Now," said Glinda, "we can go up and receive thecongratulations of the Skeezers and of our friends ofthe Rescue Expedition."

Across the water, on the shore of the lake, thePatchwork Girl was waving them a welcome.