Departure from London: Casanova likely faced some reason for leaving London in a hurry, as the title suggests a flight or swift journey. Perhaps financial difficulties, trouble with the law, or a romantic entanglement gone wrong.
Journey to Berlin: The volume would likely detail Casanova's experiences traveling across Europe in the 18th century. This could involve encounters with interesting characters, transportation methods of the time, and challenges faced along the way.
Arrival in Berlin: Casanova would likely describe his first impressions of Berlin, the social scene, and any opportunities or misadventures he found there.
Here are some suggestions for finding out more:
Consult summaries of surrounding volumes: Reading summaries of Volume 23 (London) and Volume 25 (Russia and Poland) might offer context for Casanova's motivations and next destination.
Search for scholarly articles: Academic databases might have articles that analyze specific sections of Casanova's Memoirs, including Volume 24.