deep-set beliefs

“Jeremy, I thought you guys had eyes on this room. You didn't see this guy at the door?” “It seems someone has peeped our hold card and fed a continuous loop of the hall being empty through our equipment.[…]"

Sherlock easily located the clue, but Watson considered it missable.

I am the reign of terror, the ten plagues, I am a case of the clap, I am the thing that goes bump in the night, De Shadow, death warmed over.