These remnants, rotting keepsakes of words and pictures are mnemonically residual. They are scryed, interfaces utilizing misfired sigilings, systems of incomplete quasi-alchemical call-signs and proto-symbologies loosely based upon borrowed (and in some cases stolen) artificially charged devices. When assembled into specific schemas, this soft machinery marks as it contains, and thus constructs the Terminal House.
One of the responsibilities of the Housekeeper
The wolves of the world below the ground run up and down the walls of the house. A Housekeeper who neglects his wolves will soon find his stronghold collapsed and its guardians in the final act of suicide.