Isabel drew breath to ask what a 'sort of' weapon might be but quickly thought better of it.  Again, she was not sure she wanted to know.  "The capture of five men is at the very least aggressive, yes," she agreed, dryly.  "I think we had best assume that it is quite hostile," she added, now wishing she no longer had the responsibility for the torch so that she might ready her bow.  But as the Doctor said, they certainly needed their light.<br/><br/>"What is it?" she asked, hovering closer as he put his hand to the rock.  At first she focused all her attention on that, then remembered the full situation and began both watching and listening for signs of anyone -- or anything -- approaching.  Most likely their foe would not be quiet, given its apparent ability to damage heavy stones so easily, but all the rules were changing and she was certain of much less now than she had been just an hour ago.