C. J. Sadler

Warning: This is not intended to be an exhaustive history of this individual, but an indication of the changes of positions and the links between companies, directors and managers in those companies. Only collieries, pits etc. in the North of England are shown - the individual may be involved with other companies or collieries outside this area and there may have been other positions for which we currently do not have details.

• 1888 List of Mines - Government report from the Mines Department, from a copy held in the Scottish Mining Museum, Newtongrange, Midlothian.
• 1909 List of Mines - from Reid's Handy Colliery Guide
• 1919 List of Mines - from Reid's Handy Colliery Guide
• 1923 Colliery Year Book and Coal Trades Directory. Published by The Louis Cassier Co. Ltd., from a copy held in the Scottish Mining Museum, Newtongrange, Midlothian.
• 1923 List of Mines - Government report from the Mines Department, from a copy held in the Scottish Mining Museum, Newtongrange, Midlothian.
• 1924 List of Mines - Government report from the Mines Department, from a copy held in the Scottish Mining Museum, Newtongrange, Midlothian.
• 1925 List of Mines - Government report from the Mines Department, from a copy held in the Scottish Mining Museum, Newtongrange, Midlothian.
• 1927 List of Mines - Government report from the Mines Department, from a copy held in the Scottish Mining Museum, Newtongrange, Midlothian.
• 1929 List of Mines - Government report from the Mines Department, from a copy held in the Scottish Mining Museum, Newtongrange, Midlothian.
• 1930 List of Mines - Government report from the Mines Department, from a copy held in the Scottish Mining Museum, Newtongrange, Midlothian.
• 1933 Colliery Year Book and Coal Trades Directory. Published by The Louis Cassier Co. Ltd., from a copy held in the Scottish Mining Museum, Newtongrange, Midlothian.