Extract from ‘The Hidden Peoples’ by Solin D’Teinde.
From there they continued to seek new sources of mineral wealth. It is recorded by one Egmûûnd Arcstøn in a supply requisition, that the Grûndén had infiltrated as far north as the Grughanååven, showing a growing confidence and boldness in their explorations. But all advancement ended with the coming of the Ognod wars. The Grûndén were forced to abandon their outlying small mining communities in the north because they were difficult to defend and the majority of the population moved back to the Grûndén city beneath the mountain. There they had a stronghold of impenetrable defence that the Ognod hoards never penetrated.