Fermi (Enrico) Autograph letter signed ('Enrico Fermi') to Professor Tullio Levi Civita, in Italian, politely asking for updates regarding a call for tenders from the Theoretical Physics department of the University of Rome as the deadline for applications is fast approaching, three pages, mid-horizontal folding mark, 8vo, Florence, 9 May 1925, with original mailing envelope addressed in Fermi's hand; with an autograph note from Professor Tullio Levi Civita, written on his business card, introducing mathematician Leo Zanetti who has to undertake some bibliographical research, very light soiling, 7 March 1934 (2)