It is a selection of letters related, inter alia, to the edition of Aleksander Wat's My Century, in charge of which were the poet's wife and Czeslaw Milosz. The letters are treasured at the Beinecke Rare Book and Manuscript Library (Yale University) in Czeslaw Milosz archives collection (catalogue number: GEN MSS 661). They contain important pieces of information especially about the final stage of the edition of My Century. Apart from detailed information about the edition of My Century in the letters to Czeslaw Milosz one also finds a touching text in which Watowa tells Milosz about her last meeting with Jaroslaw Iwaszkiewicz during his stay in France. In Ola Wat's letters we also come across pieces of information about American edition of My Century, for which publishing Czeslaw Milosz and Jan Gross acted as agents. The letters are published with the permission of Andrzej Wat, the poet's son, and the above selection of letters will be included into the edition of the second volume of Letters about All That Really Matters prepared by the 'Literary Notebooks' Foundation (Fundacja 'Zeszytów Literackich').