Judging by the skills on Leemus' sheet, I'm gonna say Leemus does not know much about The Gutter, just the urban legends and common knowledge.

The Gutter is a vast underground network of Old World structures. It is rich in many varieties of treasure, but it is beyond dangerous due to the rampant disease, traps, haywire security systems and other treasure hunters that lurk in the depths. Many have died in The Gutter, but every so often you hear of someone coming back from the depths with the kind of payoff that makes risking a thousand deaths worth it.