Original sentence: The Chilterns stretches in a seventy-five mile southwest to northeast diagonal from just west of Reading in Berkhire through Buckinghamshire, via Dunstable Downs in Bedfordshire to the furthest northeast ridge which runs from Deacon Hill, Pegsdon, close to the border of Hertfordshire
Edited sentence: The Chilterns stretches in a seventy-five mile southwest to northeast diagonal from just west of Reading in Berkshire through Buckinghamshire, via Dunstable Downs in Bedfordshire to the furthest northeast ridge which runs from Deacon Hill, Pegsdon, close to the border of Hertfordshire