The last of them filed in, and the masters鈥攖wo of them, carrying long metal tubes鈥攕hut the door. The Alberts were alone. The door's clang was followed by other sounds as the lock was thrown. The new noises, and the strangeness of bare metal walls and artificial light, still novel after only a single day's training, gave rise to something very like a panic, and a confused babble of voices arose from the crowd.!