al association needed a place of sepulchre. Well, a first
gallery was excavated with pickaxes in soil of this description--granular
tufa, as it is called--a reddish substance, as you can see, both soft and
yet resistant, easy to work and at the same time waterproof. In a word,
just the substance that was needed, and one, too, that has preserved the
remains of the buried in a wonderful way." He paused and brought the
flamelet of his candle near to the compartments excavated on either hand
of the passage. "Look," he continued, "these are the _loculi_. Well, a
subterranean gallery was dug, and on both sides these compartments were
hollowed out, one above the other. The bodies of the dead were laid in
them, for the most part simply wrapped in shrouds. Then the aperture was
closed with tiles or marble slabs, carefully cemented. So, as you can
see, everything explains itself. If other families joined the first one,
or the burial association became more numerous, fresh galleries were
added to those already filled. Passages were excavated on either hand, in
every sense; and, indeed, a second and lower storey, at times even a
third, was dug out. And here, you see, we are in a gallery which is
certainly thirteen feet high. Now, you may wonder how they raised the
bodies to place them in the compartments of the top tier. Well, they did
not raise them to any such height; in all their work they kept on going
lower and lower, removing more and more of the soil as the compartments
became filled. And in this wise, in these catacombs of St. Calixtus, in
less than four centuries, the Christians excavated more than ten miles of
galleries, in which more than a million of their dead must have been laid
to rest. Now, there are dozens of catacombs; the environs of Rome are
honeycombed with them. Think of that, and perhaps you will be able to
form some idea of the vast number of people who were buried in this
manner."

Pierre listened, feeling greatly impressed. He had once visited a coal
pit in Belgium, and he here found the same narrow passages, the same
heavy, stifling atmosphere, the same nihility of darkness and silence.
The flamelets of the candles showed merely like stars in the deep gloom;
they shed no radiance around. And he at last understood the character of
this funereal, termite-like labour--these chance burrowings continued
according to requirements, without art, method, or symmetry. The rugged
soil was ever ascending and descendin