Franz wrote to his mother from a Berlin detention center: “With what I knew, if I had taken the [military] oath, I would have committed a sin deserving death.
Ühest Berliini kinnipidamisasutusest kirjutas Franz emale kirja: „Kui ma oleksin oma teadmiste juures andnud selle [sõjalise] vande, oleksin teinud surmaväärt pattu.