Vault of Kuvgar Stonebeard

From the introduction: A nearly forgotten dwarven kingdom once ruled these mountains. It's rulers were wealthy beyond compare. Time and greed wore the kingdom to dust and now all that remains are ruins and wonders. Recently coins of that ancient kingdom has appeared in the streams of the foothills to the south of the mountains. Rumors have passed with the tankards that a vault laden with gold is waiting to be found. You and your friends, on a fortnight's furlough from guard duty, have set off in search of this lost horde An adventure for 6th-8th level characters