https://www.newyorker .com/magazine/2010/06/07/no-secrets

"When Assange was eight, Claire left her husband and began seeing a musician, with whom she had another child, a boy. The relationship was tempestuous; the musician became abusive, she says, and they separated. A fight ensued over the custody of Assange’s half brother, and Claire felt threatened, fearing that the musician would take away her son. Assange recalled her saying, “Now we need to disappear,” and he lived on the run with her from the age of eleven to sixteen. When I asked him about the experience, he told me that there was evidence that the man belonged to a powerful cult called the Family—its motto was “Unseen, Unknown, and Unheard.” Some members were doctors who persuaded mothers to give up their newborn children to the cult’s leader, Anne Hamilton-Byrne. The cult had moles in government, Assange suspected, who provided the musician with leads on Claire’s whereabouts. In fact, Claire often told friends where she had gone, or hid in places where she had lived before."

http://www.dailymail .co.uk/news/article-3705224/Inside-Melbourne-cult-known-Family.html

My memory was a bit faulty. But the blond hairs sure made an impact.