Hamlin is an ardent abolitionist, stemming from his 23 years as a slave before he fled his captors at age 37. He has spent the six years since then doing everything in his power to help escaped slaves and fight the scourge of slavery. Three years ago, he found the head of Lincoln's statue and established the community of the Temple of the Union. Each day, Hamlin delivers antislavery speeches to its people.
Head of State: Hannibal asks the player to check the Lincoln Memorial for super mutants and to get the Lincoln Memorial Poster for Caleb. When you get to the Lincoln Memorial you'll find out it's inhabited by Slavers. At this point, you can tell Hannibal about the slavers or turn him, and everyone else, in to Leroy Walker. If you tell Hannibal about the slavers he'll ask you to kill them, and after killing them you can tell him it's safe to go to the memorial. As a reward he'll give you the dart gun schematics.
Lincoln's Profit Margins: Hamlin is one of the potential buyers for Lincoln-related artifacts. Pays more for "good" Lincoln artifacts like his diary, and less for "bad" ones like the John Wilkes Booth poster.