The city was quiet around them as the roadbed rose slowly from below street level near the old Loop, to above street level a distance beyond Hubbard's Cave. At that point, Kyle and Moon could see more smoke and some obvious fires that still raged uncontrolled. They ducked once into cover as a swarm of insect spirits, dragonflies, appeared over the rooftops, and then quickly banked away down toward the streets. It was like the sudden passage of a heavy dark cloud that blocked the sun and deafened the ears with the whirring of giant wings. Kyle thought again about casting a spell that would make the two of them invisible, then decided against it since they didn't yet know how the creatures perceived. It might not do any good.