Pretty_little_liars_3x06

: It also deepens the mystery surrounding Toby’s mother, Marion Cavanaugh, suggesting that the "accidents" at Radley were planned or covered up long in advance.

: Spencer realizes the blueprint is dated months before the construction of that wing actually began. Pretty_little_liars_3x06

In the Pretty Little Liars episode "The Remains of the 'A'" (Season 3, Episode 06), the "interesting paper" most likely refers to the found by Hanna and Spencer . : It also deepens the mystery surrounding Toby’s

: This paper leads them to discover that a room was built into the sanitarium that wasn't on the official public records—a room that "A" (Mona) was using to sneak in and out of the facility. : This paper leads them to discover that

: While searching through a box of Toby’s things at the Apple Rose Grille, the girls find a blueprint for the "East Wing" of Radley.