Only one memo explicitly references theories about the U.S. government's possible role in Neruda's death. An October 10, 1973, memo from Lisbon, Portugal, says: "Opposition press has coupled lamentations over coup with eulogies of Pablo Neruda. One paper repeated charges of involvement of [U.S.] ambassador [to Chile Nathaniel] Davis." Davis downplayed U.S. involvement in the coup in his book "The Last Two Years of Salvador Allende." The ambassador, who died in 2011, unsuccessfully sued Universal Pictures in the 1980s over the film "Missing," which made him appear complicit in the death of an American journalist during the coup.