During his stay in Berlin in 1764, Boswell lived in the house of Karl David Kircheisen, the president of the Berlin city council.
Friedrich Karl von Forster
Sometime (until 1763 or 1764) chamberlain and privy counsellor of legation at the court of Saxe-Gotha and from March 1, 1764 chief steward of that court.1
Life with Boswell:
Note 1: Only source for this biography is The Journal of his German and Swiss Travels, 1764.