NATASCHA KAMPUSCH, who was kidnapped at the age of 10 and held for eight years until she escaped her captor in Vienna this week, kept a diary throughout her ordeal, it was revealed yesterday. Rupert Leutgeb, a family spokesman, confirmed that Fräulein Kampusch had kept a record hundreds of pages long. He said that no details would be disclosed until Fräulein Kampusch decided what she wanted to do with the diary. The revelation came after police announced that DNA analysis had established beyond doubt that the young woman who was found distraught in a garden on Wednesday is Fräulein Kampusch....