and covered every bit of the blackened steel boat. At
the same time Glinda crooned a weird incantation in the language of
sorcery, her voice sounding low and musical.

After a little the violet sparks ceased, and those that had fallen upon
the boat had disappeared and left no mark upon its surface. The
ceremony was ended and Glinda returned the skeropythrope to the Wizard,
who put it away in his black bag.

"That ought to do the business all right," he said confidently.

"Let us make a trial and see," she replied.

So they both entered the boat and seated themselves.

Speaking in a tone of command the Sorceress said to the boat: "Carry us
across the lake, to the farther shore."

At once the boat backed off the sandy beach, turned its prow and moved
swiftly over the water.

"Very good--very good indeed!" cried the Wizard, when the boat slowed
up at the shore opposite from that whence they had departed. "Even
Coo-ee-oh, with all her witchcraft, could do no better."

The Sorceress now said to the boat:

"Close up, submerge and carry us to the basement door of the sunken
island--the door from which you emerged at the command of Queen
Coo-ee-oh."

The boat obeyed. As it sank into the water the top sections rose from
the sides and joined together over the heads of Glinda and the Wizard,
who were thus enclosed in a water-proof chamber. There were four glass
windows in this covering, one on each side and one on either end, so
that the passengers could see exactly where they were going. Moving
under water more slowly than on the surface, the submarine gradually
approached the island and halted with its bow pressed against the huge
marble door in the basement under the Dome. This door was tightly
closed and it was evident to both Glinda and the Wizard that it would
not open to admit the underwater boat unless a magic word was spoken by
them or someone from within the basement of the island. But what was
this magic word? Neither of them knew.

"I'm afraid," said the Wizard regretfully, "that we can't get in, after
all. Unless your sorcery can discover the word to open the marble door."

"That is probably some word only known to Coo-ce-oh," replied the
Sorceress. "I may be able to discover what it is, but that will require
time. Let us go back again to our companions."

"It seems a shame, after we have made the boat obey us, to be balked by
just a marble door," grumbled the Wizard.

At Glinda's command the boat r