The Cosmic Computer by H. Beam Piper

All through the night, a shifting blaze of many-colored light rose and dimmed the stars above the mesa. They stared in awe, marveling at the energy that was pouring out of the converters into a tiny spot that inched its way around the collapsium shielding. It must have been visible for hundreds of miles; it was, for there was a new flood of rumors circulating in Storisende and repeated and denied by the newscasts, now running continuously. Merlin had been found. Merlin had been blown up by Government troops. Merlin was being transported to Storisende to be installed as arbiter of the Government. Merlin the Monster was destroying the planet. Merlin the Devil was unchained.

Conn and Kurt Fawzi and Dolf Kellton and Judge Ledue and Tom Brangwyn clustered together, talking in whispers. They had told nobody, yet, of the interview with Shanlee.