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| Archive Reference / Library Class No. | NCB/A/JGW/1/2/5 |
| Former Reference | N32/5 |
| Title | J. and G. Wells Limited Surveyor's diary containing rough notes of appointments and surveying sketches |
| Date | 1930 |
| Description | Including workings for Holbrook, Norwood and Westthorpe collieries. Also including annual tonnage output figures for 1929. Letts's Rough Diary, many pages unused. |
| Extent | 1 volume |
| Level | Item |
| Repository | Derbyshire Record Office |
| Archive Creator | J and G Wells Limited |
| National Coal Board |
| Format | Document |