Many of the places Bunyan describes are based on places he knew in the Bedfordshire countryside. For example, the Slough of Despond is thought to be the marshes in Tempsford (now on the A1 road). House Beautiful is thought to be Houghton House (now a ruin), just outside Ampthill. The character of the Evangelist is that of his friend John Gifford, who was the leader of a non-conformist group at St John’s Church, Bedford. The heavy burden (the load), which Christian carries on his back, represents his sins: the things he has done wrong, and which trouble him. However, the burden is also based on the heavy anvil which he carried on his back as he walked from place to place. He worked as a tinker (someone who mends pots and pans).