earth. A first reason of this lay in heredity, in the forces of history,
the long line of the heirs of the Caesars, the popes, the great pontiffs,
in whose veins the blood of Augustus, demanding the empire of the world,
had never ceased to flow. Though they might reside in the Vatican they
had come from the imperial abodes on the Palatine, from the palace of
Septimius Severus, and throughout the centuries their policy had ever
pursued the dream of Roman mastery, of all the nations vanquished,
submissive, and obedient to Rome. If its sovereignty were not universal,
extending alike over bodies and over souls, Catholicism would lose its
_raison d'etre_; for the Church cannot recognise any empire or kingdom
otherwise than politically--the emperors and the kings being purely and
simply so many temporary delegates placed in charge of the nations
pending the time when they shall be called upon to relinquish their
trust. All the nations, all humanity, and the whole world belong to the
Church to whom they have been given by God. And if real and effective
possession is not hers to-day, this is only because she yields to force,
compelled to face accomplished facts, but with the formal reserve that
she is in presence of guilty usurpation, that her possessions are
unjustly withheld from her, and that she awaits the realisation of the
promises of the Christ, who, when the time shall be accomplished, will
for ever restore to her both the earth and mankind. Such is the real
future city which time is to bring: Catholic Rome, sovereign of the world
once more. And Rome the city forms a substantial part of the dream, Rome
whose eternity has been predicted, Rome whose soil has imparted to
Catholicism the inextinguishable thirst of absolute power. And thus the
destiny of the papacy is linked to that of Rome, to such a point indeed
that a pope elsewhere than at Rome would no longer be a Catholic pope.
The thought of all this frightened Pierre; a great shudder passed through
him as he leant on the light iron balustrade, gazing down into the abyss
where the stern mournful city was even now crumbling away under the
fierce sun.

There was, however, evidence of the facts which had dawned on him. If
Pius IX and Leo XIII had resolved to imprison themselves in the Vatican,
it was because necessity bound them to Rome. A pope is not free to leave
the city, to be the head of the Church elsewhere; and in the same way a
pope, however well he may understa