The article includes two manuscripts by Maria Dembowska (died 26 June 2008) 'Memorial w sprawie biblioteki PAN w Warszawie' (Memorandum on the Library of the Polish Academy of Sciences) and the abridged version of the diary entitled 'Kronika dyrektora Biblioteki PAN w Warszawie' (The Chronicle by the Director of the Library of the Polish Academy of Sciences in Warsaw) written in 1966-1977. Both texts constitute sources for the history of the Library of the Polish Academy of Sciences in Warsaw in 1952-2005. The 'Memorial' submitted to the authorities of the Polish Academy of Sciences in 1968 discusses the scope of the Library's activity, proposes expansion of its statutory obligations, mentions obstacles in its activity (personnel and space issues, subscription of foreign periodicals) and proposes measures for amending them. The other text 'Na PANskim chlebie. Ze wspomnien bibliotekarki. Notatki z lat 1966-1977' (From the Diary of a Librarian. Notes from 1966-1977) constituting the authoress' selection (ca. 70 pages) from the 'Kronika dyrektora Biblioteki PAN w Warszawie' is the record of everyday facts (meetings, visits, official letters sent). It illustrates the process of expanding the information and bibliographic scope of the Library and transforming it into a specialist institution. The authoress discusses all the events important for the Library as well as initiatives and publications. The diary presents the authoress' opinions concerning the staff of the Polish Academy of Sciences supervising the Library. The texts were edited and comments were added by Jadwiga Sadowska.