Richard Heinz Silberberg went into hiding, but was discovered.
J. van Baar en G. Valk, Alkmaar 1940-1945. Kroniek van de bezettingsjaren (Schoorl, 1995)
Richard Heinz Silberberg died en route from Auschwitz to Mauthausen.
Entry in the necrological index of the Netherlands War Graves Foundation