The series includes nominations for Felkin's employment in the Foreign Office and examination papers for the Historical Tripos when he was a student at King's College, Cambridge in 1913, also correspondence relating to his work as an interpreter at Blandford Prisoner of War Camp, Dorset in 1916-19.

The correspondence is mainly between Felkin and Mrs Amelia Felkin, Winifred Felkin and Raisley Moorsom. Also included are letters from Goldsworthy Lowes Dickinson (2 autograph letters signed and 4 typed letters signed, no date), Florence Hardy (8 autograph letters signed and 4 autograph postcards signed, 1919 and no date), Margaret Jourdain (4 autograph letters signed, no date), Humphrey Noble (2 autograph letters signed, 1918), Hubert Waley (4 autograph letters signed, 1919 and no date) and Rachel Waley (1 autograph letter signed, 1919).

The papers were separated from the main series, AEF/3/1/1-221 by Felkin, when he found a packet of assorted documents and placed them in a bank during the First World War. Felkin filed these papers in a miscellaneous order, but for ease of reference they have been sorted into a chronological sequence. When undated letters showed a clear contextual relationship with dated correspondence, they have been left in place. All other undated items have been gathered in a single envelope.