| Luke Watchman, KC | |
| Sebastian Parish | His cousin |
| Norman Cubitt, RA | |
| Abel Pomeroy | Proprietor, Plume of Feathers, Devon |
| Will Pomeroy | His son |
| Mrs Ives | Housekeeper at the Plume of Feathers |
| The Hon Violet Darragh | Of County Clare, Ireland |
| Robert Legge | Secretary and Treasurer to the CoombeLeft Movement |
| George Nark | Farmer, of Ottercombe |
| Decima Moore | Of Cary Edge Farm and of Oxford |
| Dr Shaw | Police Surgeon, Illington |
| Nicholas Harper | Superintendent of Police, Illington |
| Richard Oates, PC | Of the Illington and Ottercombe Constabulary |
| Dr Mordant | Coroner for Illington |
| Roderick Alleyn | Chief Detective-Inspector, Criminal Investigation Department |
| T. R. Fox | Inspector, Criminal Investigation Department |
| Colonel, The Honourable Maxwell Brammington | Chief Constable |
