This is where so many people get into trouble.... assuming things we are not told, because they are not in the Bible. We invent them. (And to think, we shame Catholics for building a religion on those sorts of assumption, calling them "Traditions.")In one of the gospels it says that Jesus brought Peter, James and John with Him. Peter was not a young boy, and James was older than John, so that leaves John, the Beloved. He would have been close enough for them to grab, at least, his cloth.