Sell your relics to Feducci
From Fallen London Wiki
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From: Trade your Relics of the Third City
He has customers for antiquities waiting across the Unterzee. He will tell you of his travels in return.
Game Instructions: This will always gain you many Mysteries of the Elder Continent.
Unlocked with 
500 x Relic of the Third City
Success
Sit and listen
[…] Feducci certainly knows a great deal about the Elder Continent. What was he doing at the court of the Presbyter? […] Feducci speaks about blood-wasps and Snuffers and immortality. Dark-skinned zailors load your relics on to a steamer.
[Find the rest of the story at https://www.fallenlondon.com]
You've lost 500 x Relic of the Third City
You've gained 105 x Mystery of the Elder Continent
