Herb wasn't sure about the source of agitation, though he gave the dragon a wide birth - Natsu-dragon's flames were burning white hot, his head swiveling back and forth and scanning the area. THe dragon lunged forward suddenly, heading down the same path Lucy had taken earlier - and at the same time, as you extend every single one of your senses, you can pick up Lucy's sent following in the same direction, back the way you came. Only oddly before you would come to that clearing you found Herb, the scent just _stops_. And goes... left. But towards the left there's a thich cavern wall covered, absoltuely COVERED by vegetation, bramble and - actually you can smell Justine and Nev too, much more faintly.