|Book(s)||The World of Ice & Fire (mentioned)|
Archmaester Edgerran was one of the archmaesters at the Citadel. His ring, rod, and mask were made of silver, which meant he was an expert in medicine. He wrote a treatise on the swaddling of infants and tested his theories on the infant Maester Yandel.
- The World of Ice & Fire, Preface.