Feed the fish with her
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From: The Giggling Charwoman
And keep looking down at the sturgeon while you talk.
Unlocked with 
10 x Phosphorescent Scarab
Success
Scarabs for the sturgeon
"Concord Square. Such a bother. I've dealt with them before, but this time it's different. You know. Orders from higher up. […]
"Here's another souvenir. Courtesy of my time sweeping their offices. They should install better locks." She giggles. […][Find the rest of the story at https://www.fallenlondon.com]
Success Instructions: Continue by meeting the Dilmun Club if you haven't already, and examining the packet's contents – both in 'Pursuing Leads for the Youthful Naturalist'
Tracking Down the Charwoman has increased to 4!
You've lost 10 x Phosphorescent Scarab
You've gained 1 x Vital Intelligence
