Most of them are your notes. Classically a student of Ta-yra would be expected to just remember everything, but you find it comforting to have physical records of what you've learned and your speculations on what it all means. You're happy paper has been so cheap since the angel-fuelled trade boom of the '60s. This does not, however, prevent your room from being the most horrific fire hazard imaginable. It's lucky you're such a meticulous custodian and always know the state of each and every candle in the shul, nu?