Mrs. Lancaster

The "Unknown Elwood City Librarian" is another librarian at the Elwood City Public Library, besides Paige Turner. She mostly had cameo appearances, and only appeared in earlier seasons.

In "Arthur and the Real Mr. Ratburn," she jumped back in fear upon discovering Arthur and Buster hiding in her book cart.

She has a speaking role in "Arthur Makes a Movie" where she was locked out of the library's computer network system. Neither she nor Miss Turner could regain control because The Brain accidentally hacked into the system, which included access to the electrical circuitry.

The librarian also appeared in "Meek for a Week," where she was shown as a resident of Westboro Apartments. She is seen as one of the residents who come to the roof to complain about Francine's loud drumming. In this appearance, she is in her pajamas.

The librarian also bears a resemblance to Becky.

Episode Appearances
This list is incomplete; please add to it if you know any other appearances.
 * Arthur
 * 10201 Arthur and the Real Mr. Ratburn
 * 11701 Meek for a Week
 * 20401Arthur Makes a Movie