A walker heard the noise first, a strange chittering coming from a thin cleft in the rock.
Laying down he squinted into it but could see nothing, the sound was louder here echoing slightly and a foetid stench assaulted his nostrils. Thinking it a little strange the walker mentioned it to the Park ranger who, with a companion investigated further shining torches into it, thrusting their fingers into the narrow fissure to feel a warm current of air.
The Ranger baffled by the strange phenomenon contacted an acquaintance in the National Geological Society, who in turn sent along a curious scientist with a pair of eager students. When he showed his visitors to the fissure they were surprised to see it was now wide enough to push an arm into.
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