He concluded he'd best do the deed now, while the witch-brew was still impairing his judgment. So he took off most of his clothes. He could come back for them later if this worked. He took only his sword (in case trouble awaited), flint, and steel, and his miner's hat, which would be good to have if he smashed his head against any underwater ceilings. Then he backed up the tunnel several paces, got a running start downhill, and dove in. The water was murderously cold and he almost screamed out his one lungful of air. He grazed the ceiling once – the light grew brighter – the ceiling wasn't there any more, and so he kicked against the sump's floor and burst up into fresh air! The distance had been only three or four yards.