A cheeky Bavarian boy in leather Lederhosen — a red heart stitched on the seat of his pants — holds a bouquet aloft toward the ruined towers of Heidelberg Castle, his back turned to the viewer in a winking visual joke: the verse beside him reads, "Ich hab' mein Herz in Heidelberg verloren, dafür ließ ich mir ein's auf's Hös'chen näh'n…" ("I lost my heart in Heidelberg, so I had one sewn on my pants — and what else I found there, you can see inside!"). Open the flap cut into the boy's trouser pocket and a concertina of tiny black-and-white photographic views unfolds: the castle seen from the terrace (Das Schloß von der Terrasse gesehen), the old Neckar bridge (Alte Neckarbrücke u. Schloß), the castle courtyard (Der Schloßhof), and more miniature scenes of one of Germany's most romantic cities. Mailed in September 1936 from Heidelberg to young Stanley in Dayton, Ohio, with a Deutsches Reich 5 Pfennig Hindenburg stamp — a warm family momento sent across the Atlantic on the eve of the Second World War.