The "crook quotes" were the phrases found under each crook's name in the Dossiers. The quotes were a type of cryptic clue. You substitute city puzzle answers for words in the clue and follow the resulting directions found in the clue. Ling Wi Stik variable constant speed includes D_0 FREQUENCY i FAST THE DO is actually D-subscript-zero; it's a technical linguistic term for a determiner, like 'the'. Ask team Feel about their Noam Chomsky interview. :) = FIFTH EAST (FI; FAST includes THE)