Going back a few days, to Slovenia: at my stop in Maribor I couldn't resist buying this pamphlet, spotted in a local antiquarian book shop (€7). It's from the early 1960s and the cover, roughly translated, says "Cyclist! You're not the only one on the road!" It gives basic tuition on how to behave on two wheels and strikes a quaintly patronising tone, from the time when bikes were seen more as a nuisance than a positive (they still are in many places, of course). It also has a gruesome illustrated section on dealing with the injuries caused by accidents with cars, which seems to me more to the point.
On my third day cycling the Berlin wall trail (which is a circular route of about 180km around the former border of West Berlin, in case I didn't mention it before), I came to the south-west of the city, in the area around Potsdam, home of the kaisers, a place of lakes and forests and very many castles and palaces. Potsdam is where Churchill, Truman and Stalin settled the post-war division of Germany and then became the headquarters of the Russian presence in East Germany. It still has a strong whiff of the Cold War about it. I crossed the Glienicke bridge, which was used for spy exhanges, then passed the former KGB prison below, which is being turned into a museum. Later I passed some 19th C barracks buildings that were occupied by red army troops after the war and vacated by them only in 1994. They are locked up and awaiting conversion into luxury flats, but I found a way into one of the buildings and discovered lots of Russian graffiti left by the soldiers.