sentences:  The Leeds and Carlisle left the Leeds Northern Railway near Headingley and passed through Wharfedale to Hawes and the Eden Valley.These schemes came together as the Northern Counties Union Railway, which was given authority in 1846 for a line from Thirsk to Clifton and a line from Bishop Auckland to Tebay.However, it would have cost £35,000 to pass through the estate of the Duke of Cleveland between Bishop Auckland and Barnard Castle, and it was a condition of the enabling Act that work on the two lines must be simultaneous.