Argabuthon is a rather advanced planet. The people dispense justice with a sceptre of plexiglass, and the chamber of Law is made from the wood of Arglebard trees. Prak was locked up on this planet after he was given too much of a truth drug. It turned out that the plexiglass Sceptre of Justice is, in fact, the Perspex Pillar of Science and Reason, which was what the Krikkits needed to finish the gate.