Cover the Astronomer's initial costs
From Fallen London Wiki
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From: A Trading Post at Zenith: False Lights and False-Stars
"I need paper, and inks, and cartographer's tools. Supplies aren't cheap, up here. Few visitors. Fewer still capable of mercantile enterprise."
Game Instructions: The Astronomer can transpose Roof-Charts into Surveys of the Neath's Bones and Glass Gazettes.
Unlocked with 
5000 x Stuiver, 
A Trading Post at Zenith exactly 1
Success
Far-ranging
Even up here, barter […] is the quickest way to effect a change […]
From airship wreckage […] tools and instruments: octants, broken gnomons, alidades and orreries. Few will be useful to the Approximate Astronomer […] But he […] more than equipped to begin his trade again.[Find the rest of the story at https://www.fallenlondon.com]
You've lost 5000 x Stuiver
You've aided the Astronomer. (Sets 
A Trading Post at Zenith to 2)
