The relics and artifacts discovered by the investigators as they delved ever deeper in to the mysteries surrounding The King in Yellow.

• Bone Whistles, the cult devices used by the follower of Hastur to call down the Byakhee.
• The Yellow Sign, an occult symbol connected to The King in Yellow and Hastur. This image seems to have an disturbing effect on those who see it.
• The Chime of Tezchaptl, a silver bell that can be imbued with the power to reflect magic. Discovered in Lawrence Bacon's home, the process for enchanting the chime was outlined in The Turner Codex.
• Springer Mound Monoliths, nine granite obelisks found discovered first at Springer Mound and then later at Loch Mullardoch.