Yellin is the quaternary antagonist. The Chief Enforcer of Florin, he is in charge of a spy network. Prince Humperdinck falsely informs him of a plot by Guilder to assassinate Buttercup. Yellin says he has had no news of this but follows out Humperdinck's orders to have the thieves' forest emptied before the wedding. The castle gates are locked on the wedding night and guarded by sixty men, but after Westley, Inigo, and Fezzik's subterfuge, they are able to frighten away the guards and get the single gate key from Yellin.