In addition to their concealment of the Frank and van Pels families and of Fritz Pfeffer at the Prinsengracht, Miep and Jan also took in a student, who had refused to sign a Nazi oath. Following the arrest and deportation of the hidden families in August 1944, Miep rescued the diaries and other manuscripts of Anne Frank from the hiding place before it was ransacked by the Dutch secret police. Of the eight people she and Jan had assisted to hide, Otto Frank was the sole survivor. Upon Frank's return to Amsterdam in June 1945, he moved in with them and stayed with them for seven years before he emigrated to Switzerland to be close to his mother.