Butterley Company correspondence file on mineral supports from Kirkby Colliery, and leased from the Duke of Portland, under the Great Northern Railway at Sutton-in-Ashfield Including draft copies of agreements, minutes of meeting between representatives of the Great Northern Railway Company and Butterley Company, 30 Sep 1915, plan of Great Northern Railway near Sutton, early 20th cent, and reports and notes from meetings between Mr Holbrook and Mr Wilson, 11 Feb 1915-7 Sep 1915. Jan 1915-Oct 1915