From his computer (which the Lone Wanderer can hack without Karma penalties), the Lone Wanderer can discover that young Arthur enjoys writing stories, has a crush on Sarah Lyons (because she taught him to kill a man by stabbing him in the kidneys), and that there is a Guns and Bullets magazine underneath a bed in the den.
"Oh, well... You see, I am descended from the great Roger Maxson, founder of our order. I am the last of his line. They say my soul was forged from eternal steel, but I don't believe that. I'm really just a normal boy."
"I did go out one time, you know! Sarah... Um... Sentinel Lyons took me out. Just to show me. I killed a Super Mutant, too! I swear! I, um... I also sort of shot Sarah. But just a little! It was just a flesh wound..."
If the Lone Wanderer talks to him and asks, "Do they make you fight?" He will say that he accidentally shot Sarah Lyons and says, "It was just a flesh wound", a reference to the fight between Arthur and the Black Knight from Monty Python and the Holy Grail.