The treaty was ratified 'through the agency of' a neutral country.
He found work as a mechanic through an 'employment agency'.
an athlete who has become eligible for 'free agency'
(..) Oh! Okay, now for the announcement. I have accepted a new job. Whoa! Really? Yes, I have been recruited by a top-secret agency to go undercover and save the world! You're gonna be a spy? That's right, baby! Gru's back in the game. (..)2013 Despicable Me 2