bristol enamelled slate and marble

[johnsam38]

when was the company
"W.J.Temple enamelled slate and marble works bristol"
in operation and were was the works

[NazNomad]

Tricky one ... I wonder if an email to the Bristol Marble Company might result in an answer, or a contact that would know?

http://www.bristolmarble.com/contact.asp

[buildersmate]

You would be extremely lucky to find someone who knows this directly.
The more creative way to solve this is to try to connect to someone who might be able to tell you where to find the answer - as per Naz' suggestion, or to this link which gives various possibilities to local history society groups in Bristol and surrounding area.
http://fishponds.org.uk/linkpage.html