knocker-up

... And Capper was a very important man. He was the knocker-up in the village of Polkingthorpe Brig — that is to say, he got up early every morning and went round with his pole, tapping on the bedroom windows and waking up the people in time for them to get to work... Old Capper got his long pole with the trident of wire at the end and lifting it so that the wire rested against the upstairs window pane, began twirling and twisting the pole in the palms of his hands so that the wire clacked and clattered fit to wake the soundest sleeper... So they stood round old Capper, who had one of the few watches in the village...