1870: [1]

Norwood Colliery……………………………………..33

Evenwood Colliery……………………………………63

Total……………………………………………………96

2 collieries were unionised

1872: [2]

Butterknowle………………………………………….120

Carterthorne…………………………………………….90

Evenwood………………………………………………140

Lands (Cockfield Fell)…………………………………60

Norwood………………………………………………..100

Railey Fell……………………………………………….100

Total……………………………………………………610

6 collieries were unionised

1912:[3] VOTES CAST IN THE 1912 BALLOT

Randolph………………………………………………..533

Gordon House…………………………………………350

Carterthorne…………………………………………….38

New Copley…………………………………………….102

Total………………………………………………….1023

Only the 4 larger collieries appear to have been unionised.

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[1] “History of the Durham Miners’ Association 1870-1904” J. Wilson p.22

[2] “The Banner Book” Bill Moyes

[3] “Auckland & County Chronicle” 11 April 1915 p.5