You search the monkey.
She had a rolaren dagger, a silver-twined dark mithril stiletto with an ebony hilt.
She didn't carry any silver.
She had nothing else of value.
A monkey decays into compost.
>.get sti
[Script get is running, Esc to cancel, Shift-Esc to pause]
>shea
>get sti
>put sti in my mant
[script done]
You put a rigging knife in your bear-hide mantle.
>
Get what?
>
I could not find what you were referring to.
>l
[Zoo, Slate Path]
The pool here is swarming with many differing species of small fish, all swimming peacefully among the weeds. You can see several varieties of colorful guppies, minnows and fresh water damselfish and a few that you don't recognize. The slate path slopes downward to the east, leading to another part of the zoo. You also see a rolaren dagger, a monkey paw and a crude vaalorn dagger.
Obvious paths: east, southwest
>.get dag
[Script get is running, Esc to cancel, Shift-Esc to pause]
>shea
>get dag
You aren't holding any weapons in your hands.
>put dag in my mant
[script done]
You pick up a rolaren dagger.
>
You put a rolaren dagger in your bear-hide mantle.
>sear
>
You spy a silver-twined dark mithril stiletto with an ebony hilt that had been obscured from view!
Roundtime: 6 sec.

I'm guessing the monkey picked it up from the shadows (I'd actually been looking for where I lost that stiletto), but shouldn't it revert to being in the open again without my having to search it out once a critter picks it up?

Starchitin

A severed gnomish hand crawls in on its fingertips and makes a rude gesture before quickly decaying and rotting into dust. A gust of wind quickly scatters the dust.