The adventurers found 2 additional things near the ravine.
The first was a series of glyphs written in Dwarven alphabet, but not in Dwarven language.
Spoiler: If you know Goblin language
The signs mark the terrain as goblins' territory and are a warning for everybody who would like to go deep below.
The second thing was an old fire, maybe a month old. Some people had their stop here, and tried to hide its track after they went further, Gods only know where.