The Unknown-Sid Greene-1948

In the vein of all the other storytellers of the macabre such as radio's Whistler and Mysterious Traveler and Bob Powell's Man in Black (called Fate)--as opposed to the more tongue-in-cheek EC ghoulunatics and the later Cain and Abel--here we have THE UNKNOWN. A great logo! GCD has no clue but I think it's a safe bet this is by SUPER MYSTERY COMICS regular Sid Greene as there's a little "S.G." on the lower right of the splash panel.