I first heard Four Until Late sung by Eric Clapton on the Fresh Cream album. It was one of the first songs I learned on guitar, and some of the misheard lyrics I still sing, such as She made so many men wear apron overalls. Robert Johnson, of course, was the author of the song (although clearly influenced by Blind Blakes Georgia Bound- see my video). In 1937, he travelled to Dallas, Texas, for his second and final recording session in a makeshift studio at the Brunswick Record Building, 508 Park Avenue. He recorded this song on 19 June 1937. It goes without saying that Johnson was one of the most influential blues singers in history. Wikipedia has a substantial profile on him. There are only two photos of Johnson that I know of, and I have used these and others to make a slideshow video. Comments are welcome.