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.