The time it took Mal and Will to travel away from the rest of the crew (and he's taken to calling them that now, no matter how misplaced the vocabulary feels to him) allowed for Mal to calm any normal pre-thieving jitters out of his system.

Looking to Will, Mal double-checks his pair of pistols -- one far more advanced than the other -- and enters into the main altar room, quickly finding only one old priest asleep in the far left corner.

A jerk of the head toward the opposite corner. Might as well look around.