L. Frank Baum

“ 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. ”

“ 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. ”