's power. Bid your slaves raise the leaves of my book to
the number of fifteen.'

It was done, and Caesar turned towards the enormous open book.

'Come forth!' he said. 'Come forth, my legions!'

Then something in the book moved suddenly, and out of it, as out of an
open marble tomb, came long lines of silent armed men, ranged themselves
in ranks, and, passing Caesar, saluted. And still more came, and more
and more, each with the round shield and the shining helmet and the
javelins and the terrible short sword. And on their backs were the
packages they used to carry with them into war.

'The Barbarians of Gaul are loose in this city,' said the voice of the
great commander; 'drive them before you once more as you drove them of
old.'

'Whither, O Caesar?' asked one of the Roman generals.

'Drive them, O Titus Labienus,' said Caesar, 'back into that book
wherein I set them more than nineteen hundred years ago, and from which
they have dared to escape. Who is their leader?' he asked of Philip.

'The Pretenderette,' said Philip; 'a woman in a motor veil.'

'Caesar does not war with women,' said the man in the laurel crown; 'let
her be taken prisoner and brought before me.'

Low-voiced, the generals of Caesar's army gave their commands, and with
incredible quietness the army moved away, spreading itself out in all
directions.

'She has caged the Hippogriff,' said Philip; 'the winged horse, and we
want to send him with a message.'

'See that the beast is freed,' said Caesar, and turned to Plumbeus the
captain. 'We be soldiers together,' he said. 'Lead me to the main gate.
It is there that the fight will be fiercest.' He laid a hand on the
captain's shoulder, and at the head of the last legion, Caesar and the
captain of the soldiers marched to the main gate.

CHAPTER XII

THE END

Philip tore back to the prison, to be met at the door by Lucy.

'I hate you,' she said briefly, and Philip understood.

'I couldn't help it,' he said; 'I did want to do something by myself.'

And Lucy understood.

'And besides,' he said, 'I was coming back for you. Don't be snarky
about it, Lu. I've called up Caesar himself. And you shall see him
before he goes back into the book. Come on; if we're sharp we can hide
in the ruins of the Justice Hall and see everything. I noticed there was
a bit of the gallery left standing. Come on. I want you to think what
message to send by the Hippogriff to Mr. Noah.'

'Oh, you needn'