
Yost wrote "Mary Dow Brine" on the back of this GLP panel.
Medusa was the mother of Pegasus, the flying horse, and Chrysaor, a young man (and/or giant). They were both born in the moment when Perseus cut off Medusa's head. Chrysaor translates as "He who has a golden sword"; apparently he emerged from his mother's body (or blood) with sword in hand.