Mr. Chapman,
A useful source of photos and information on tramways in the slate
industry is the magazine entitled "Industrial Gwynedd", published by Plateway
Press. Perhaps you are familiar with this publication already.
In any case, Volume 3 (1998) has articles on slate workers that show
tramways in use, and another on the Dorothea Qyarry, which shows both aerial
tramways and inclines. These cannot be considered extensive coverage of the
tramway topic, but there are a few references that may provide additional
details on the subject installations.
I am not certain whether this magazine is still published, and as with
many of the Plateway publications, they tend toward the industrial railroad
family of tramways.
Regards, Larry M. Southwick, P.E.
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