The “young girl” referred to in Francesca’s letter was Anna-Dorothea Kleer, daughter of the porter of the castle.  This young girl became pregnant in 1786 and Casanova was accused of seducing her.  The guilty one, however, was a painter named Schottner who married the unfortunate girl in January 1787.

9th August 1786.

“My only true friend,

“It is two days since I received your dear letter; I was very happy to see your writing ....  You have reason to mortify me and reproach me in recalling all the troubles I caused you, and especially that which you call treachery, the sale of your books, of which in part I was not guilty . . . .  Forgive me, my dear friend, me and my foolish mother who, despite all my objections, absolutely insisted on selling them.  Regarding that which you write me that you know that my mother, last year, told about that you had been my ruin, this may unhappily be true, since you already know the evil thoughts of my mother, who even says that you are still at Venice . . . .  When have I not been always sincere with you, and when have I not at least listened to your good advices and offers?  I am in a desperate situation, abandoned by all, almost in the streets, almost about to be homeless . . . .  Where are all the pleasures which formerly you procured me?  Where are the theatres, the comedies which we once saw together? . . .”

5th January 1787.

“The first of the year I received your dear letter with the bill of exchange for one hundred and twenty-five lires which you sent me so generously . . . .  You say you have forgiven me for all the troubles I have caused you.  Forget all, then, and do not accuse me any more of things which are but too true and of which the remembrance alone cuts me to the heart . . . .  You write me that you have been forgotten by a person of whom you were very fond, that she is married and that you have not seen her for more than a month.”

The “person” referred to was Anna Kleer.

5th October 1787.

. . . .  “Until the other day, I had been waiting for your arrival, hoping that you would come to assist at the entry of the Procurator Memmo . . . .  I see by your good letter that you were not able to get away, since your presence is nearly always necessary in the great castle . . . .  I learn of the visit you have received from the Emperor who wished to see your library of forty-thousand volumes! . . .  You say that you detest the chase and that you are unhappy when politeness obliges you to go . . . .  I am pleased to know that you are in good health, that you are stout and that you have a good appetite and sleep well . . . .  I hope that the printing of your book [Histoire de ma fuite] is going according to your wishes.  If you go to Dresden for the marriage of your niece, enjoy yourself for me . . . .  Forget not to write to me; this gives me such pleasure!  Remember me.  Full of confidence in your friendship, I am, and always will be, your true and sincere friend,