Einstein's 1950 will appointed Helen Dukas and Otto Nathan as trustees of the estate and stated, "[A]ll literary rights and assets shall be vested in the Hebrew University." After Einstein's death in 1955, the trustees spent many years organizing Einstein's papers. In the 1960s, Helen Dukas and the physicist Gerald Holton of Harvard University in the USA reorganized the archive, with the aim of publishing the material, in a joint project between the Hebrew University of Jerusalem and Princeton University Press. The material increased from 14,000 documents at the time of Einstein's death in 1955 to around 42,000 documents in 1982. To aid in this work, Einstein's papers were transferred from his Princeton home to the Institute for Advanced Study in Princeton, New Jersey.