There are 6 collections items in this Investigation.- The Black Codex of Rlyeh
 
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Click on the thumbnail to see the original image. - Soul-flensinf Sorceries
 
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Click on the thumbnail to see the original image. - Demonaica Lingua: The Demon Tongue
 
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Click on the thumbnail to see the original image. - The Last Grimoire of Erasmus Jorn
 
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Click on the thumbnail to see the original image. - The Diary of Hermes Trismegistus
 
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|  Type: Investigation | | City: Metropolis | | Zone: Chinatown |
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#5 listed above it actually #3 in the game.
Yeah, like Pants says “Demonaica Lingua: The Demon Tongue” is the 5th investigation in “Confiscaed Arcanum” investigation, not the 3th as is showed here!