The Professor's deprecating murmur was cut short by an outburst from
another of the learned group, a red-faced spectacled personage in a
doctor's gown.

"Pardon me for suggesting," he exclaimed, "that the conditional terms in
which our host was careful to present his hypotheses are better suited
to the instruction of the neophyte than our learned friend's positive
assertions. But if the Vulcanists are to claim the Cavaliere Valsecca,
may not the Diluvials also have a hearing? How often must it be repeated
that theology as well as physical science is satisfied by the Diluvial
explanation of the origin of petrified organisms, whereas inexorable
logic compels the Vulcanists to own that their thesis is subversive of
all dogmatic belief?"

The first speaker answered with a gesture of disdain. "My dear doctor,
you occupy a chair in our venerated University. From that exalted
cathedra the Mosaic theory of Creation must still be expounded; but in
the security of these surroundings--the catacombs of the new faith--why
keep up the forms of an obsolete creed? As long ago as Pythagoras, man
was taught that all things were in a state of flux, without end as
without beginning, and must we still, after more than two thousand
years, pretend to regard the universe as some gigantic toy manufactured
in six days by a Superhuman Artisan, who is presently to destroy it at
his pleasure?"

"Sir," cried the other, flushing from red to purple at this assault, "I
know not on what ground you insinuate that my private convictions differ
from my public doctrine--"