in some combination of
explosive matters. He, Bertheroy, had modestly declined to adjudicate,
for the fragment submitted to him bore traces of so slight a character,
that analysis became impossible. Thus he was unwilling to make any
positive pronouncement. But his opinion was that one found oneself in
presence of some unknown powder, some new explosive, whose power exceeded
anything that had hitherto been dreamt of. He could picture some unknown
_savant_, or some ignorant but lucky inventor, discovering the formula of
this explosive under mysterious conditions. And this brought him to the
point he wished to reach, the question of all the explosives which are so
far unknown, and of the coming discoveries which he could foresee. In the
course of his investigations he himself had found cause to suspect the
existence of several such explosives, though he had lacked time and
opportunity to prosecute his studies in that direction. However, he
indicated the field which should be explored, and the best way of
proceeding. In his opinion it was there that lay the future. And in a
broad and eloquent peroration, he declared that explosives had hitherto
been degraded by being employed in idiotic schemes of vengeance and
destruction; whereas it was in them possibly that lay the liberating
force which science was seeking, the lever which would change the face of
the world, when they should have been so domesticated and subdued as to
be only the obedient servants of man.

Throughout this familiar discourse Pierre could feel that Francois was
growing impassioned, quivering at thought of the vast horizon which the
master opened up. He himself had become extremely interested, for he
could not do otherwise than notice certain allusions, and connect what he
heard with what he had guessed of Guillaume's anxiety regarding that
secret which he feared to see at the mercy of an investigating
magistrate. And so as he, Pierre, before going off with Francois,
approached Bertheroy to wish him good day, he pointedly remarked:
"Guillaume will be very sorry that he was unable to hear you unfold those
admirable ideas."

The old _savant_ smiled. "Pooh!" said he; "just give him a summary of
what I said. He will understand. He knows more about the matter than I
do."

In presence of the illustrious chemist, Francois preserved the silent
gravity of a respectful pupil, but when he and Pierre had taken a few
steps down the street in silence, he remarked: "W