of regret at the decision which I had come to in
October, 1845.

I had my reward, moreover, the day after I entered the humble school
in which I was to occupy for three years and a-half such a lowly
position. Among the pupils was one who, owing to his successes and
rapid progress, held a place of his own in the school. He was eighteen
years old, and even at that early age the philosophical spirit, the
concentrated ardour, the passionate love of truth, and the inventive
sagacity which have since made his name celebrated were apparent to
those who knew him. I refer to M. Berthelot, whose room was next to
mine. From the day that we knew each other, we became fast friends.
Our eagerness to learn was equally great, and we had both had very
different kinds of culture. We accordingly threw all that we knew
into the same seething cauldron which served to boil joints of very
different kinds. Berthelot taught me what was not to be learnt in the
seminary, while I taught him theology and Hebrew. Berthelot purchased
a Hebrew Bible, which, I believe, is still in his library with its
leaves uncut. He did not get much beyond the _Shevas_, the counter
attractions of the laboratory being too great. Our mutual honesty and
straightforwardness brought us closer together. Berthelot introduced
me to his father, one of those gifted doctors such as may be found in
Paris. The father was a Galilean of the old school, and very advanced
in his political views. He was the first Republican I had ever seen,
and it took me some time to familiarize myself with the idea. But
he was something more than that: he was a model of charity and
self-devotion. He assured the scientific career of his son by enabling
him to devote himself up to the age of thirty to his speculative
researches without having to obtain any remunerative post which would
have interfered with his studies. In politics, Berthelot remained true
to the principles of his father. This is the only point upon which
we have not always been agreed. For my part I should willingly resign
myself, if the opportunity arose (I must say that it seems to grow
more distant every day), to serve, for the greater good of
humanity now so sadly out of gear, a tyrant who was philanthropic,
well-instructed, intelligent, and liberal.

Our discussions were interminable, and we were always resuming the
same subject. We passed part of the night in searching out together
the topics upon which we were engaged. After