I'm trying to come up with a noun that is more descriptive (or at least carries more tone) than "knowledge" and more succinct than "esoteric knowledge and trivia". Rather than saying "this person possesses a great deal of esoteric knowledge and trivia" I'd like to be able to say
This person possesses a great deal of _______.
For more clarification: I'm hoping to describe a character very similar to Sherlock; someone who collects an overabundance of seemingly useless knowledge on the off chance that it becomes relevant.
Thanks for your help!