Final answer:
Vincent Spaulding introduces Mr. Wilson to 'The Red-Headed League,' catching his interest with the unusual criteria of having red hair and the promise of easy money.
Step-by-step explanation:
The character Vincent Spaulding informs Mr. Jabez Wilson about a unique opportunity devoted exclusively to red-haired men, which piques Wilson's interest; this event is part of the narrative of 'The Red-Headed League,' a Sherlock Holmes short story by Arthur Conan Doyle. The allure of the league and the subsequent promised payment for simply possessing red hair is what captures Wilson's attention and propels the story forward.