thumb|right|Greater Manchester lies at the conjunction of the ancient county boundaries of Cheshire, Lancashire and the West Riding of Yorkshire. From the River Mersey to River Ribble was recorded as an area surveyed with Cheshire in the Domesday Book of 1086; it is thought that the area was partially surveyed.
thumb|right|Greater Manchester lies at the conjunction of the ancient county boundaries of Cheshire, Lancashire and the West Riding of Yorkshire From the River Mersey to River Ribble was recorded as an area surveyed with Cheshire in the Domesday Book of 1086; it is thought that the area was partially surveyed