| Quote | Author | Source | Email Quote |
|---|
| "Singularity is almost invariably a clue. The more featureless and commonplace a crime is, the more difficult it is to bring it home." | Sir Arthur Conan Doyle | The Boscombe Valley Mystery |  |
| "Circumstantial evidence is a very tricky thing," answered Holmes thoughtfully. "It may seem to point very straight to one thing, but if you shift your own point of view a little, you may find it pointing in an equally uncompromising manner to something entirely different." | Sir Arthur Conan Doyle | The Boscombe Valley Mystery |  |
| "There is nothing more deceptive than an obvious fact." | Sir Arthur Conan Doyle | The Boscombe Valley Mystery |  |