Get the information you need, then end him
From Fallen London Wiki (Staging)
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From: Ambition: Nemesis – Confronting Cumberbold
He looks up as you approach. His face is unfinished. His eyes are vague lumps. He has no mouth.
Locked with 
6
Success
Mouthless or not, he has a story to tell
Afterwards, you cast the chisel aside […] [the cave's] glistening clay walls were studded with tokens: coins, scraps, calling cards […] you can make out an eye, something pointed, and a fragment of a word: NEROFT. Is that a name? An acronym? […]
Description summary:
The Mute arranged Scathewick for someone else. His ambiguous records in the walls. A clay impression your only clue.
[Find the rest of the story at https://www.fallenlondon.com]
An occurrence! Your 'A Clue: Cumberbold's Stamp' Quality is now 1!
Your 'Evidence in the Cumberbold Case' Quality has gone!
Ruthless is increasing… (+5 CP, up to level 15)
