There seems to be some confusion. "Dirty Hands" is a play by Jean-Paul Sartre, a French philosopher and playwright. It was written in 1948, and its original French title was "Les Mains Sales."
John Delaney is a modern-day author and playwright. He's not known for writing a play called "Dirty Hands." It's possible you are thinking of a different work or have misremembered the author.