Fun, Loud, Determined

Gasren Rockbreaker is one of the three Dwarf brothers who rediscovered Wave Echo Cave. His younger brothers, Tharden Rockseeker and Nundro Rockseeker, were in Phandalin some time before his arrival but have gone missing. He was also a friend to Hildar HallWynter, a member of the Lords’ Alliance hired as a personal guard. They were captured traveling to Phandalin by the Cragmaw tribe and Gasren was sent to be held in Cragmaw Castle, according to information Hildar HallWynter overheard while held captive.
 
Gasren had a map showing the secret location of Wave Echo Cave, but the goblins took it when they captured him. Sildar believes that Klarg sent the map and the Dwarf to the chief of the Cragmaws at a place called Cragmaw Castle. Sildar doesn't know where that might be, but he suggests someone in Phandalin might know. (It doesn't occur to Sildar immediately, but a captured Goblin might also be persuaded to divulge the castle's location. See the "What the Goblins Know" sidebar on page 8.)