I’ve just noticed that my 1794 copy of  Campe’s Kinder Bibliothek has a library stamp from “Königl. Friedrich Wilhelms Gymnas.” which I presume is the Friedrich Wilhelms Gymnasium in Berlin (although it could be one of several others), once on the corner of Kochstraße and Friedrichstraße, sadly no longer extant. 

I see that Bismarck was a pupil there, perhaps he read the same book?