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| Archive Reference / Library Class No. | NCB/A/BUT/13/2/8 |
| Former Reference | N5/212 |
| Title | Butterley Company correspondence file on developments at collieries in the Marehay District |
| Date | May 1933-Nov 1942 |
| Description | Comprising Denby Hall, Hartshay and Marehay collieries. Including loose copies of confidential report by H. Eustace Mitton on Denby Iron and Coal Company Limited, 18 Oct 1929 |
| Extent | 1 file |
| Level | File |
| Repository | Derbyshire Record Office |
| Archive Creator | Butterley Company |
| National Coal Board |