One of the most well known works that was executed by Jung is called the Red Book. In 1913 at the age of thirty-eight, Jung experienced a horrible "confrontation with the unconscious". He saw visions and heard voices. He worried at times that he was "menaced by a psychosis" or was "doing a schizophrenia." He decided that it was valuable experience, and in private, he induced hallucinations, or, in his words, "active imaginations." He recorded everything he felt in small journals. Jung began to transcribe his notes into a large, red leather-bound book, on which he worked intermittently for sixteen years. Jung left no posthumous instructions about the final disposition of what he called the "Red Book". His family eventually moved it into a bank vault in 1984. Sonu Shamdasani, a historian from London, for three years tried to persuade Jung's heirs to have it published, to which they declined every hint of inquiry. As of mid-September 2009, fewer than two dozen people had seen it. Ulrich Hoerni, Jung's grandson who manages the Jung archives, decided to publish it.