Basic Dungeons and Dragons page B22: Experience points (abbreviated XP, as ep stands for electrum pieces) are given for non-magical treasure and for defeating monsters. Is this why in most games ...
I really like my good ol' Moldvay Basic D&D. Every once in a while, it's missing a rule I want, and I make it up. Then I feel clever. Sometimes, though, I want to know what everybody else did ...