- FondsNewmanL - Papers of Lyn Newman
- SeriesA - Correspondence
- SubseriesA2 - Miscellaneous correspondence
- FileKeynes - Letters from John Maynard Keynes and his wife Lydia variously to Lyn and Max Newman
- Item1 - Autograph picture postcard signed by LK and JMK featuring an illustration from the British Museum of St Francis receiving the stigmata.
- Item2 - ALS from Lydia Keynes on Mayflower, Washington DC airmail paper, addressed to Lyn at 270 Mercer Street, Princeton, New Jersey.
- Item3 - TLS to Lyn Newman from Washington DC
- Item4 - TLS from John Maynard Keynes from the British Supply Council in North America, addressed to Mrs Newman, The Mill House, Scotland, Connecticut.
- Item5 - TLS to Lyn Newman from Washington DC
- Item6 - TLS to Max Newman from Bloomsbury
- Item7 - Autograph plain postcard from Tilton, West Firle, near Lewes, Sussex.
- Item8 - Autograph postcard with printed letterhead 'From the Lady [struck through] Lydia Keynes, Tilton, West Firle, near Lewes, Sussex. Telephone Ripe 226.