During his stay in Berlin in 1764, Boswell lived in the house of Karl David Kircheisen, the president of the Berlin city council.
Eckhard August von Stammer - Knight of the Teutonic Order
Eckhard August von StammerBorn 1705
Lord of Ballenstedt and Asmusstedt, and Chief Master of Horse at the the court of Brunswick in the 1760s. He became head of the Saxon branch of the Teutonic Knights in 1773.1
Boswell met a "Monsieur de Stammer, a Knight of the Teutonic Order" on June 27, 1764, for whom he had a letter from Count Bentinck. Boswell met him a few more times during the following months. On August 18, Boswell waited on him in Brunswick, writing in his journal that the knight "had fallen from his horse and broken an arm".
Note 1: The Journal of his German and Swiss Travels, 1764, p. 17
The identification of Eckhard von Stammer in Boswell on the Grand Tour I, 1763-1764 and The Journal of his German and Swiss Travels, 1764 is probably correct. However, one Eckhard Heinrich von Stammer (1721-1777) had been in the service of the Dukes of Brunswick since 1738, and died with the rank of general in 1777. In 1762 he was a Major General. There is probably a family relation between the two. (According to Doblin & Lynn. (1993). The American Revolution, Garrison Life in French Canada and New York: Journal of an Officer in the Prinz Friedrich Regiment, 1776-1783.