He returned again in 1964 , with Mrs Maria Chiocchetti .
He was too ill to travel when some of the other prisoners returned in 1992 to commemorate the fiftieth anniversary of their arrival on the island .
He returned again in 1964 , with Mrs Maria Chiocchetti , but he was too ill to travel when some of the other prisoners returned in 1992 to commemorate the fiftieth anniversary of their arrival on the island .