| Solver | Motive | Angle of View | Salient Feature | Method of Proof | Parallel Case | Criminal |
|---|---|---|---|---|---|---|
| Sir Charles Wildman | Gain | Cui bono | Notepaper | Inductive | Marie Lafarge | Lady Pennefather |
| Mrs. Fielder-Flemming | Elimination | Cherchez la femme | Hidden triangle | Intuitive and Inductive | Molineux | Sir Charles Wildman |
| Bradley (1) | Experiment | Detective-novelist’s | Nitrobenzene | Scientific deduction | Dr. Wilson | Bradley |
| Bradley (2) | Jealousy | Character of Sir Eustace | Criminological knowledge of murderer | Deductive | Christina Edmunds | Woman unnamed |
| Sheringham | Gain | Character of Mr. Bendix | Bet | Deductive and Inductive | Carlyle Harris | Bendix |
| Miss Dammers | Elimination | Psychology of all participants | Criminal’s character | Psychological deduction | Tawell | Sir Eustace Pennefather |
| Police | Conviction, or lust of killing | General | Material clues | Routine | Horwood or lunatic | Unknown fanatic |