| RefNo | Title |
| DF/ADM/1005/10 | Baylis, Dr Harry A |
| DF/ZOO/200/63/13 | Baylis, Harry Arnold, 1889-1972 (Gosport) |
| DF/ZOO/252/1/11/14 | Baylis, Harry Arnold (London) |
| DF/ZOO/200/119/19 | Baylis, Harry Arnold |
| DF/TM/3/11/47/7 | Baylis, H A |
| RS/2/23 | Dr Benjamin Dawes and Dr Harry A Baylis: correspondence |
| DF/ZOO/200/65/10 | Baylis, Harry Arnold, 1889-1972 (Gosport) |
| DF/ZOO/268/1 | Baylis, Harold Arnold: Correspondence and Papers |
| DF/ZOO/232/5/14/2/7 | Baylis, H.A. |
| DF/ZOO/232/5/13/1/16 | Baylis, H.A. |
| DF/ZOO/232/5/22/1/9 | Baylis, Doctor H.A. |
| DF/ZOO/232/6/12/2/5 | Baylis, Doctor H.A. |
| DF/ZOO/232/6/13/1/7 | Baylis, Dr H.A. |
| DF/ZOO/208/101 | Staff file: Baylis, Harry A |
| DF/ZOO/268/1/2 | Correspondence of H A Baylis |
| DF/ZOO/208/45 | Staff file: Baylis, Harry A |
| DF/ZOO/232/6/11/1/16 | Baylis, Doctor H.A. |
| DF/ZOO/200/61/12 | Baylis, Harry Arnold, 1889-1972 (Gosport) |
| DF/PH/2/1/4/3 | Staff Group Photograph: 'The Establishment' (Full Staff Photograph) |
| DF/PH/2/6/7/3 | Staff Group Photograph: Zoology Department |
| DF/PH/2/6/7/2 | Staff Group Photograph: Zoology Department |
| DF/ADM/1000/99 | Reports and letters 1914 |
| DF/ZOO/252/1/13/6 | Baylis, Harry Arnold (Gosport) |
| DF/ZOO/252/1/14/9 | Baylis, Harry Arnold (Gosport) |
| DF/ZOO/259 | Parasitic Worms Section Correspondence and Papers |
| DF/ZOO/200/74/1 | Correspondence B (personal): File 1 |
| DF/TRU/906/3 | Minutes of meetings of the Principal Trustees, with nomination and other papers |
| DF/PH/2/1/4/4 | Staff Group Photograph: 'The Establishment' (Full Staff Photograph) |