Wells Water Courses - St John's Priory Mill (5). This is the site of St. John's Bridge where the brethren of St John's Priory, opposite, had a mill (5) which utilized the power from St Andrew's Stream flowing from the wells of the Bishop's Palace. It continues on to Sheldon's Mill on West Street where, the ground having fallen 2 metres, it turned a breast shot wheel of which the remains can be seen in the entrance of the old Mill buildings (6). St Andrew's Stream carries on to Keward Mill on Jocelyn Drive (7) which ceased working in about 1970 but the hatch spillway and mill intake are preserved as are the 5ft water wheel and some mill machinery. The stream eventually joins the River Sheppey and Brue.