Firedamp detection was by means of a flame safety lamp. Another founder member was William Reid Clanny, a pioneer of the safety lamp. The cause was assumed to have been the ignition of firedamp by a safety lamp. Samson also stated that old workings should only be accessed with a safety lamp. A version of the miner's safety lamp is used, kept alight in the air. It has a mining museum, whereupon is standing a huge miners safety lamp.