Mass and the Byzantine Rite Divine Liturgy, to hear confessions, conduct retreats and perform secret and illegal parish ministry. Until he was allowed to write to America in 1955, he was presumed dead by both his family and the Society of Jesus. By April 22, 1955, Ciszek's hard labor sentence was complete, and he was released with the restriction to live only in the city of Norilsk. At this time, he was finally able to write to his sisters in the United States. After setting up a Catholic parish in Norilsk, Ciszek was ordered by the KGB in 1958 to move to Krasnoyarsk, where he secretly established several nearby mission parishes. After the KGB learned of this, he was forcibly transferred to Abakan, to the south, where he worked as an automobile mechanic for four more years. In 1963, he finally received a letter from his sisters in the US. Several months later, the Soviet Union grudgingly decided to return him (and an American student Marvin W. Makinen) to the United States in exchange for two Soviet agents. Fr. Ciszek was not aware that U.S. Presidents Dwight D. Eisenhower and John F. Kennedy had both been demanding his repatriation since the arrival of his first letter to his sisters in 1955. He remained oblivious until he was flown to Moscow and delivered to an official of the US State Department, who told Fr. Ciszek that he was still an American citizen. Release and later life After nearly 23 years of imprisonment, Ciszek was released with American student Marvin Makinen on October 12, 1963. In exchange, the Soviets received GRU agents Ivan Dmitrievich Egorov and his wife Alexandra Egorova, whom the FBI had arrested for espionage in July 1963. In 1965, Ciszek began working and lecturing at the John XXIII Center at Fordham University (now the Center for Eastern Christian Studies at the University of Scranton in Scranton, Pennsylvania), counseling and offering spiritual direction to those who visited him. On December 8, 1984, Ciszek died after many years of declining health and was buried at the Jesuit Cemetery in Wernersville, Pennsylvania. Legacy Nine audiotapes of interviews conducted with Ciszek (c. 1964) remain at archives in Georgetown University. According to Fr. Constantin Simon, S.J., With God in Russia, Fr. Ciszek's memoir of his decades in the USSR, went through multiple editions in various languages, including French, German, Spanish, Italian, Dutch, Portuguese, Polish,