What Attracted to Wilambran to the Chicago State Fair?

William branham claimed that he allegedly had these seven visions in 19 33. He met with different ministers who met at the chicago world's fair, many of which had the same idea. And according to my grandfather and several men who attended this church, william bran buried a list,. a piece of paper with a list of his seven prophecies in the corner stone of this church, right under this concrete inset. When william brans died, they actually dug up this corner stone in the building, because he's supposed to have said it was empty. There was no prophecies there. It just really didn't add up. My grandfather claimed this all the time