Yeah. He studied magic himself for a time. But then Uther had it banned. [He grows somber at that. He didn't just have it banned, there were executions too. Gaius only escaped it because of his friendship with the king and recanting.] He took a great risk to his own life by keeping it.

[Sometime he wonders why he did. He didn't at the time that a young sorcerer would come into his life. Merlin looks at her face for a moment, trying not to smile before pushing it in front of her and granting that permission.]

There's more than spells. The's information about all sorts of magical beasts and too. Herbs, everything.