After completing half of the mission, Bartlett and the 'Vulgar Novel' party continued their journey in the foggy forest.
The Barbarian Adventurer still walked at the front, looking around for any traces of Frost Insects. Strictly speaking, this wasn't a difficult task. Frost Insects naturally emitted cold air which left a clear trail of white frost, making them easy to recognize. Moreover, since they had long and large bodies, the friction noise between their bodies and the ground during their movements was not small, so there was no need to worry about missing them.
However, as the Misty Forest was vast, each Frost Insect had its own separate range of activities with hardly any overlap, so once you found the first one, searching for the second required a bit of luck.