Scribe Yearling

Scribe Yearling is a 30-year old member of the Capital Wasteland Brotherhood of Steel's Scribes. She can be found front desk area of the Arlington Library. She is related to the The Wasteland Survival Guide quest. Scribe Bigsley implies that she was assigned to the Arlington Library because she clashed with her superiors, most likely Scribe Jameson or Elder Lyons.

Unmarked quest: Yearning for Learning
When speaking with her upon entering the building for the first time, if she is spoken to nicely she will offer you 10 XP and 100 caps for each Pre-War Book you take to her.

Trivia
Yearling's name and her job of collecting books may be a reference to Yearling books, an imprint of the publishing company Random House.

Appearances
Scribe Yearling appears only in Fallout 3.

Bugs
Yearling calls you an outsider even if you have gained the titel Brotherhood Knight.