| Description | Includes minutes of meeting between Butterley Company and Staveley Coal & Iron Company, Mar 1921 and minutes for the Butterley Company about Ollerton Colliery Jan-Mar 1921; hand drawn map of mine dip between Ollerton and Wellow, early 20th cent, scale 6 inches to 1 mile, 41cm x 41cm; hand drawn seam plan of workings at Ollerton and Boughton, early 20th cent, scale 100 feet to 1 inch, 25cm x 39cm. Mention is also made of Trefor Belgian Boring & Sinking Company and the Underfeed Stoker Company Ltd. |