If a "clue" means a piece of hard evidence—an object—we will not find ten of them in many detective stories, since few criminals are that careless. If, however, we include multiple deductions from the same piece of evidence, as well as intangible clues, there will be plenty from which to choose. For instance, the story opens with the first piece of evidence: "a very seedy and disreputable hard-felt hat." From this, Holmes makes at least ten deductions. Whether we say that the hat is a clue or that it gives Holmes ten clues is a matter of semantics. His deductions include the following:
1. The owner is highly intellectual.
2. He has been reasonably well-off within the last three years.
3. He is no longer well-off now.
4. He used to have foresight, but now he has less.
5. His wife no longer loves him.
6. He leads a sedentary life.
7. He is middle-aged and out of condition.
8. He has grizzled hair, which he has had cut within the last few days.
9. He wears lime cream in his hair.
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