Agnes of Glanville
was the first human
woman to become a sorceress
. She was a master of air-based magic
, a member of the first Chapter
and the author of the book The Secret of Secrets
Kalkstein mentions an "old friend", Agnes de Glanville when he is discussing making Raven's armour with Geralt. He mentions that her lair is still in one of the ancient crypts in the swamp cemetery.