Internet Hivemind: Activate!

Below is an email from a Gameblog reader.  Can anybody help here?

Jeff:

I've been approached to join a AD&D 2E game and wanted to play a dwarven rune caster. I remember there are published rules regarding runes and rune casting in 2E, but cannot for the life of me remember where. I've long since (unfortunately) disposed of all my 2E materials.

That sounds like something one would find in either a later Complete book or some Forgotten Realms supplement, but that's just a guess on my part. Back in the day group used the first four Complete books (Fighter, Mage, Cleric, Thief) and not many other supps.