 The two remained friends—with ups and downs—for almost 30 years, during which time Garbo wrote de Acosta 181 letters, cards, and telegrams, now at the Rosenbach Museum & Library in Philadelphia.Garbo's family, which controls her estate, has made only 87 of these items publicly available.In 2005, Mimi Pollak's estate released 60 letters Garbo had written to her in their long correspondence.