Crack open the Sounder and capture its operating principle

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This page contains details about Fallen London Actions.

From: Your Corresponding Sounder

It contains a connection that cannot be easily severed.

Game Instructions: You will always get a Violant-filled Mirrorcatch Box. On a success, you will also recover some materials.

Unlocked with 1 x Mirrorcatch Box, 1 x Corresponding Sounder

Challenge information

Narrow, Artisan of the Red Science 10 (50% base)

  • 6 and below - almost impossible (10%)
  • 7 - high-risk (20%)
  • 8 - high-risk (30%)
  • 9 - tough (40%)
  • 10 - very chancy (50%)
  • 11 - chancy (60%)
  • 12 - modest (70%)
  • 13 - very modest (80%)
  • 14 - low-risk (90%)
  • 15 and above - straightforward (100%)


Carefully done

It is like disassembling a device wound up with tensed springs. [...] Violant light seeps out of it. [...] you make sure to open the box and capture as much as you can, [...]

The box is in your thoughts for days afterwards. [...] It is difficult to forget about.


Wrenched open

With the tip of a screwdriver, you pry open the sounder; its pieces fly apart in a release of tension, and violant light floods the room. You have just enough time to capture it with your mirrorcatch box.
Mirrorcatch Box Overview
Colour Place Storylet
Empty Fiddler's Scarlet Acquire a rarity
The Magistracy of the Evenlode (Side) for the defendant in a civil suit of Gondoliers against a Society Matron
The Waswood Reach towards the shore ( Airs 0-49, rare success)
Upper River Give a speech in Ealing Gardens/ Jericho Locks (rare success)
Any Mirrorcatch Box in your Inventory[1] Empty a Mirrorcatch Box
Peligin The Magistracy of the Evenlode The Light-In-Exile
Oneiric Pearl Barter with a Listless Pearl-Diver
Violant Khan's Heart Walk into the Office of Naval Affairs
(gives Corresponding Sounder)
Apocyan The Pillared Sea Drowning
Viric Viric Jungle Attend to the Dreamer
Cosmo­gone The Dome of Scales The Top of the Dome
Irrigo Cave of the Nadir A pause for refreshment
Rat Market ( Rat-Moon: Blue or Soft[2]) The Maundering Rat's Stall
Gant Khan's Heart All Gant
Rat Market ( Rat-Moon: Hard or Runny[2]) The Smaller Stalls
Sun-Stamped Cut with Moonlight FATE The Alleys of London: the Criminals
Park and Palace: Society
Neathoscope The Museum of Prelapsarian History The Inorganic Sciences Wing
  1. Using the boxes where they are required will usually also return an empty box to you.
  2. 2.0 2.1 (currently Hard)