As many of you have heard me say before I'm a big fan of The Shadow radio show that ran from the late 1930's through early 1950's. Blue Coal was one of the most memorable sponsors of the old-time radio show. "Blue Coal" was the term for a once-popular, specific, trademarked brand of anthracite, mined by the Glen Alden Coal Company in Pennsylvania, and sprayed with a blue dye at the mine before shipping to its Northeastern U.S.A. markets to distinguish it from its competitors. Click below to listen to a sample of one of their old radio commercials:
Also, please enjoy the work-in-progress snapshot below as I was inking panel 2.