| 1 | Bobby | Jones | Protagonist. aka: Robert Jones, Edward Hawkins. |
| | Dr. | Thomas | Bobby's companion. |
| 2 | Thomas | Jones | Bobby's father. Vicar. |
| | Bassington | Ffrench | Stranger Bobby met at the bottom of the cliff. |
| 3 | Frankie | | Bobby's childhood friend. aka: Lady Frances Derwent. |
| | Angela | | Frankie's friend. |
| | Leo | Cayman | Amelia's husband. aka: Mr. Cayman. |
| | Alex | Pritchard | The dead man Bobby found on the cliff. |
| | Badger | Beadon | Bobby's childhood friend. Planning on starting a business with. |
| 4 | The | Coroner | Police officer that took the inquest on Alex's death. |
| | Amelia | Cayman | Alex's sister. aka: Mrs. Cayman. |
| 6 | Carrie | | Badger's aunt. |
| | | Henriquez | Owner of the Henriquez and Dallo Firm. |
| | | Dallo | Co-owner of the Henriquez and Dallo Firm. |
| | Mrs. | Roberts | Mr. Roberts's wife. |
| | Mr. | Roberts | Man who ran the vicarage in Marchbolt. |
| 7 | Dr. | Thorndyke | Bobby's doctor. |
| 9 | Lord | Marchington | Frankie's father. |
| | Mr. | Owen | Owner of Messr. Wheeler & Owen. |
| | Frank | | Mr. Owen's junior clerk. |
| | Inspector | Williams | Frankie's old acquaintance. Police inspector. |
| 10 | George | Arbuthnot | Doctor. Frankie's accomplice. |
| 11 | Sylvia | Bassington-Ffrench | Accompanied Frankie on her fake accident. |
| 12 | Tommy | Bassington-Ffrench | Sylvia and Henry's son. |
| | Henry | Bassington-Ffrench | Sylvia's husband. Master of the house. |
| | Roger | Bassington-Ffrench | Henry's brother. Sylvia's brother-in-law. |
| 13 | Jasper | Nicholson | Doctor. Bassington-Ffrench's friend. |
| | Moira | Nicholson | Sylvia's friend. Dr. Nicholson's wife. |
| | Alan | Carstairs | Big game hunter and explorer. Alex's look-alike. |
| 14 | John | Savage | Millionaire. Alan's friend. |
| | Reeves | | Bassington-Ffrench's message boy. |
| 15 | Mr. | Askew | Landlord. Witnessed Lady Frances's fake accident. |
| 16 | Frederick | Spragge | Frankie's father's solicitor. |
| 17 | Hubert | Rivington | Alan's friend. aka: Colonel Rivington. |
| | Edith | Rivington | Colonel Rivington's wife. |
| 25 | Rose Emily | Templeton | John's acquaintance. |
| 27 | Dr. | Davidson | Local coroner assigned in Henry's death. |
| | Edgar | Templeton | Rose Emily's husband. |
| 29 | Rose | Chudleigh | Mr. Templeton's cook. aka: Mrs. Pratt. |
| | Albert | Mere | Mr. Templeton's gardener. |
| | Elford | | John Savage's lawyer. |
| | Leigh | | John Savage's lawyer. |
| 31 | Gladys | | House parlourmaid of Mr. Templeton. |
| 33 | Donald | King | Frankie's acquaintance. |
