and from some dozen others who are not mentioned in them. The only
letters in the whole collection that have been published are those from
the Prince de Ligne and from Count Koenig.



IV.

Casanova tells us in his Memoirs that, during his later years at Dux, he
had only been able to 'hinder black melancholy from devouring his poor
existence, or sending him out of his mind,' by writing ten or twelve
hours a day. The copious manuscripts at Dux show us how persistently he
was at work on a singular variety of subjects, in addition to the
Memoirs, and to the various books which he published during those years.
We see him jotting down everything that comes into his head, for his own
amusement, and certainly without any thought of publication; engaging in
learned controversies, writing treatises on abstruse mathematical
problems, composing comedies to be acted before Count Waldstein's
neighbours, practising verse-writing in two languages, indeed with more
patience than success, writing philosophical dialogues in which God and
himself are the speakers, and keeping up an extensive correspondence,
both with distinguished men and with delightful women. His mental
activity, up to the age of seventy-three, is as prodigious as the
activity which he had expended in living a multiform and incalculable
life. As in life everything living had interested him so in his
retirement from life every idea makes its separate appeal to him; and he
welcomes ideas with the same impartiality with which he had welcomed
adventures. Passion has intellectualised itself, and remains not less
passionate. He wishes to do everything, to compete with every one; and it
is only after having spent seven years in heaping up miscellaneous