Berlong is the twin brother of Leblong
the dragon, who was most likely,
though not certainly, dispatched by the warlock Grawl
. Grawl had agreed
to dipose of Berlong in exchange for Leblong's service in guarding a
cavern. While Leblong never witnessed the aledged death of Berlong,
Grawl at least reported to Leblong that he had done so.
|SOURCE(S): Zork: The Cavern of Doom|