One of the contractors of the Kendal Windermere Railways had also built one third of the railways in which country by 1847?
Kendal and Windermere Railway:  The engineer was Joseph Locke and the partnership of contractors consisted of Thomas Brassey, William Mackenzie, Robert Stephenson and George Heald. Thomas Brassey:  By 1847, he had built about one-third of the railways in Britain, and by time of his death in 1870 he had built one in every twenty miles of railway in the world.
Britain