sentences:  Modern Ordnance Survey maps, and all historical editions since they were first published, do not name any of the streams to the west of Rochford.Essex County Council, who publish a 16-page walking guide to the Roach Valley Way, a route around the district, label the third stream as the River Roach.The Environment Agency, who are responsible for measuring the water quality of English rivers, label the third stream as the Noblesgreen Ditch, and the fourth stream, from Hockley and Hawkwell, as the Roach.