 Several of his personal files were stolen and were never recovered, and his apartment was wired.In the mid-1970s, during a renovation of their apartment, Kocbek's son Jurij Kocbek discovered a microphone hidden in the wall.Kocbek wrote a famous poem for the occasion, entitled "A Microphone in the Wall" ("Mikrofon v zidu"), in which he poetically juxtaposed technology to human activity.