Quote Originally Posted by Laf View Post
Caliburn? was sword in the stone
Excalibur was given by lady of the lake.
Well, it really depends on the version of the story you're reading. In a few, there's only one sword. In Mallory's Morte Darthur, they were two separate swords but both named Excalibur (confusing!). Caliburn is itself obviously just a variant of Excalibur.