Mapping out the underground is all well and good, but it helped to know what was above when you traveled below. Digging up to put in a chandelier and popping a pool would be bad and all that.
Hence why Circe was willing to lend her house
to the investigation session. She'd a large table, lots of Internet, and a big LCD that could be hooked into her computer for better displaying the maps from her home's intranet.
Circe also had food too, though with only a single visitor that wasn't as big an issue. On the plus side, the two queens could easily debate whom in their court would be best to "volunteer" to investigate the toilets. Well, the Summer was also monarch now, so volunteering folks sounded fun to her and she could do it, Seraphina could give input. This thought made Circe laugh.