Archwilio ein Casgliadau

Blaenserchan Colliery, film negative

Blaenserchan Colliery, film negative

Cwmgwili Colliery, film negative

Garw Colliery, film negative

Coegnant Colliery, film negative

Graig Merthyr Colliery, film negative

Bargoed Colliery, negative

Merthyr Vale Colliery, film negative

Big Pit Colliery, film negative

Big Pit Colliery, film negative

Celynen North Colliery, film negative

Blaenant Colliery, film negative

Tirpentwys Colliery, film negative

Glyntillery Colliery, film negative

Six Bells Colliery, film negative

Nixon's Navigation Colliery, photograph

Coegnant Colliery, film negative

Betws Mine, film negative

Front cover of a book of 172 cyanotypes of ferns

Cyanotype of the fern Gleichenia circinata