Meanwhile, a single codex had been sold in Cairo to a Belgian antiques dealer. After an attempt was made to sell the codex in both New York City and Paris, it was acquired by the Carl Gustav Jung Institute in Zurich in 1951, through the mediation of Gilles Quispel. It was intended as a birthday present to the famous psychologist; for this reason, this codex is typically known as the Jung Codex, being Codex I in the collection. Jung's death in 1961 resulted in a quarrel over the ownership of the Jung Codex; the pages were not given to the Coptic Museum in Cairo until 1975, after a first edition of the text had been published. The papyri were finally brought together in Cairo: of the 1945 find, eleven complete books and fragments of two others, 'amounting to well over 1000 written pages', are preserved there.