"Go back," the horseman shouted; but his voice did not reach the swimmer, who, in a few strokes, was in the full force of the stream, and was soon lost to the sight of the horsemen among the short foaming waves of the torrent.

"The boy will be drowned," one of the horsemen said, spurring his horse up the valley; but in another minute the lad was seen breasting the calmer water just above the ford.

"You cannot cross here, Captain Hume," he said, as he approached the horsemen. "You must go nigh a mile up the river."

"Why, who are you, lad?" the horseman asked, "and how do you know my name?"

"I'm the nephew of Nigel Graheme. Seeing how deep the floods were I came out to show you the way, for the best horse in the world could not swim the Nith here now."

"But this is the ford," Captain Hume said.

"Yes, this is the ford in dry weather. The bottom here is hard rock and easy to ride over when the river is but waist deep, but below and above this place it is covered with great boulders. The water is six feet deep here now, and the horses would be carried down among the rocks, and would never get across. A mile up the river is always deep, and though the current is strong there is nothing to prevent a bold horseman from swimming across."