- FondsBeaton - Papers of Sir Cecil Beaton
- SeriesA - Correspondence
- SubseriesA1 - General letters to Beaton
- File5 - Mercedes de Acosta. Autograph letters to Beaton.
- Item1 - Autograph letter signed to Beaton, from Brentwood Heights, California
- Item2 - Autograph letter signed to Beaton, from Park Avenue
- Item3 - Autograph letter signed to Beaton, from Paris
- Item4 - Autograph letter signed to Beaton, from 315 East 68th Street, New York
- Item5 - Autograph letter signed to Beaton