"LOCKED YOU SAY?" ADAMUS said. Rummaging through his pack he pulled out the odd key he had found earlier. He held the small trinket out for inspection.

"WOULD THIS PERCHANCE MATCH THE LOCK?" he asked. Mentally he tried to get into the mind of whomever defended this place. An intruder comes along, tries one door and finds it locked, tries the other door and all of a sudden a face full of sleeping powder. All else equal the locked door was the actually interesting one, given booby traps would usually be placed where your own troops wouldn't have a large chance of tripping them: Doubly so if the troops in question were not renown for their intelligence, like say, orcs.