Belznork Gibblewitz was either an employee or manager of the Frobozz Magic Homing Pigeon Company in 883 GUE.

In 883 GUE, one of his unsent packages to Eek Numblatz was found at the Flatheadia Post Office. The peasant who would became the First Dungeon Master took liberty of its abandoned state to open it. The Frobozz Magic Homing Pigeon and Perch within were essential to "solving" the Curse of Megaboz.

SOURCE(S): Zork Zero