Nothing, but the signal was wonky, so if there was anything around they had it in hidden mode, which was not uncommon for professionals to do.  The humming of the one woman, the working of the dwarf... you'd think that woman would take her job more seriously.  And then, it stops... about the time the humming<em>and</em>the dwarf finishes...<br/><br/>That was odd... but considering the dwarf was so seriously surprised before...<br/><br/>"How are you so tired?" she asked, gesturing for the dwarf to hold up "And why was it that the whistling and humming you did just now when you should be paying attention and doing your job stop the same time the wireless electronic interference in my comm during signal scanning stopped?  Been feeling like I've been being watched for a bit now..."<br/><br/>Of course, when you had an SMG in hand, finger next to the trigger, Tzahala figured the truth would be coming out of the woman soon enough...