This question is about "holes" where Stanlei, in the concentration camp to which he was, begins to dig tunnels and at that moment finds a rock. The rock had a fossilized fish and Stanley was excited about it, but soon the anaimation ended when he was told that this fossil would be of no value. At that moment, he continues to dig and finds a gold tube, with a large drawn heart, in which the letters K.B were engraved.