also mentioned by The Oxford Dictionary of National Biography (vol. 6 (1885), p. 159), "There is a tradition that on seeing some criminals going to execution he exclaimed: 'But for the grace of God there goes John Bradford.'"
books.google.com
the suggestion was put forward, apparently from memory, by George Borrow in his influential Lavengro: The Scholar—the Gypsy—the Priest, Part 2, 1851, p. 37 : "it was old John Newton, I think, who, when he saw a man going to be hanged, said: 'There goes John Newton, but for the grace of God!"
britannia.com
"John Bradford". Britannia.com. Britannia Biographies. Archived from the original on 17 June 2008. Retrieved 10 October 2014.
