Roger Delage was a French musicologist and conductor. He was the leading authority on the life and works of the composer Emmanuel Chabrier, and as a conductor was known for reviving the music of early French composers such as Guillaume de Machaut.
From Wikipedia (https://en.wikipedia.org/wiki/Roger_Delage) under Creative Commons Attribution CC-BY-SA 3.0 (http://creativecommons.org/licenses/by-sa/3.0/legalcode)