"This is a safe place, at least it had been for the past fifty years. The Frost authorities never knew that such a secret lay beneath their feet," Nemo Wilkins said as he walked into the deep underground hideout, turning to address Duncan and the others who followed him, his tone laced with obvious pride, "These ancient sewers crisscross in every direction, most areas are abandoned and thus dry and safe, and there are some branches leading to the upper-level pipeline systems, but all the access points are secure. Even if one or two are discovered, City Hall cannot possibly search the entire underground structure—they simply don't have enough manpower."
The "tavern owner" said this and walked over to a nearby concrete wall, where he turned a valve on a pipe. A faint hissing sound of airflow came from afar—immediately, more gas lamps lit up, and those that were already on burned brighter.