We never rested after the bar fight so... I used 2 level 0's and 2 level one's during it and after the last two cantrips, have no spells left.(No spells were regained yet, but they haven't used all of them up. You'll probably have to regroup and rest at some point anyways.)
With the lantern lit you can all see much better. No one notices anything dangerous, but the source of the strong coppery smell in the area is revealed. The small stream that Ashnod saw is actually blood flowing threw a channel cut into the surface. Jess notices a slight moaning sound over the burbling of the stream of blood coming from the furthest chamber (A3).
(For all rooms the ceiling height is roughly 12-15 feet, 8 feet in hallways. Worked walls are of masonry, while cavern walls are of solid limestone