Blind Jack of Knaresborough: Illustrated biography and family tree of John Metcalf.
Hyde Historical Group - John Metcalfe: Short essay about the old Stockport to Mottram turnpike road built in 1765.
John Metcalf or Blind Jack of Knaresborough: Illustrated story of his life and his triumph over blindness to lead a life full of achievements including road building.
John Metcalf, Road-Maker: Complete text of chapter VI of Samuel Smiles, the Life of Thomas Telford.
Wikipedia: John Metcalf: Biography, portrait and related links.