Directions:

Buchler Chininfrabrik (Buchler Quinine Works), is now a vacant lot, Frankfurter Straße 294 - N52 15.43 E10 30.77.
Giesel's home was present at the Buchler property - N52 15.39 E10 30.73.
Giesel's second home (no longer present), Obergstraße 2 - N52 15.38 E10 31.58.
The Stadtisches Museum sometimes has displays on local history including Buchler, Steintorwall 14 - N52 15.66 E10 31.93.