Who is Captain F G Irwin? Captain F.G. Irwin was a notable Freemason and author recognized for his significant contributions to Masonic literature. He is particularly known for his work titled The Symbols of Freemasonry, where he explores the deeper meanings behind various symbols used within the fraternity. Irwin's writings are characterized by their clarity and insightful interpretations, aiming to illuminate the ethical and spiritual teachings of Freemasonry for both its members and the public. His dedication to understanding and articulating these principles has made his work a valuable resource for those seeking to explore the rich tradition of Freemasonry.