Possible Clues:

• John . . . . . . wrote 'The Pilgrim's Progress'
• Legendary lumberjack
• Legendary Paul
• 'Pilgrim's Progress' author
• He had a blue ox
• Author of 'The Pilgrim's Progress'
• John ...... wrote ` `The Pilgrim's Progress' '
• Lumberjack of lore
• Maker of the Grand Canyon, in myth
• Author of Pilgrim's Progress