While traveling around Europe the group visited Germany. While there they took an open bus tour around Berlin and Potsdam. Frederick C.J. Wiss is standing in the middle looking straight towards the camera. The route can be seen in the map below. Brochure from eBay. [When open brochure is approx. 23-5/8" × 9-1/2".] Click on web-sized pictures to get full-sized ones.