I stand corrected. Apparently Tommy Lawrence, "the flying pig", was the first sweeper/keeper; it was a "Shankly thing". Clemence succeeded Lawrence in the Liverpool team and according to this
web site - admittedly no more an authority than this one - claims he perfected the role.
"Clemence went on to re define the art of goalkeeping. The ’sweeper keeper’ role given to Lawrence when Shankly employed the ‘Swiss bolt ‘ formation, was perfected by Clemence.
His speed off his line and constant prowling of the penalty area allowed defenders to push on and helped the reds high pressure game. "
But we digress, and the sun is shining outside. I'm only a 60 minute drive away from a Rossi's ice cream!