An article on the Ranfelin over at the wiki. Midge and Sam are Ranfellin.
For a review of the girls' first theories and discussion regarding the facts presented in the data they found on the necklace drive, look here:Block II: pages 13-18.
This is the end of Block IV. Starting next Tuesday, the 20th, an intermission will begin. The intermission will run Tuesdays and Thursdays, in this space, for five weeks. Block V begins April 26th, and will then return to regular weekly updates.