Rubimor (pens and inks)
From National Comics #31 - 9 pages - Case #5 - The Baskerville Brothers had run a successful circus but they augmented their income with bank heists and other forms of larceny. When one of the brothers decides to steal military secrets and sell them to the Nazis, the other objects. A tip to Don Leash brings G-2 into action.
Here are the pages I have of it.