Members of a charity group loyally devoted to helping their old friends met in secret last weekend. They arrived in ones and twos at the nicely painted house with a well-tended lawn – ever on the look-out for any hidden observer who may have threatened their anonymity.In most countries they would have passed for modest do-gooders anxious to conduct their benevolent work out of the public gaze.But there is nothing humanitarian about this shadowy organisation or the kindly looking old lady at the heart of its dark web.For the covert gathering was the quarterly meeting of Stille Hilfe – or Silent Aid – which has helped some of the Third Reich’s most evil fugitives from justice.And one of its most revered and terrifying figures is the 81-year-old daughter of Heinrich Himmler, architect of the Holocaust. Mother-of-two Gudrun Himmler, known as the Princess of Stille Hilfe, joined other confederates of the Nazi aid group at its weekend summit in Munich.During her childhood she worshipped her father, who organized the murder of six million Jews.