In the summer of 1953, Eli Simpson set out to make a film for the British Speleological Association called The Birth of a Yorkshire River or The Waters of Mawn. The film collection is comprised of rushes he shot at locations such as Ingleborough Cave, Malham Cove, and Hull Pot, all located in the Yorkshire Dales, and many of the films include both interior and exterior footage of the caves. Title - After flowing a short distance the waters are gradually engulfed in the limestone fissures...

In the summer of 1953, Eli Simpson set out to make a film for the British Speleological Association called The Birth of a Yorkshire River or The Waters of Mawn. The film collection is comprised of rushes he shot at locations such as Ingleborough Cave, Malham Cove, and Hull Pot, all located in the Yorkshire Dales, and many of the films include both interior and exterior footage of the caves. Title - After flowing a short distance the waters are gradually engulfed in the limestone fissures here at TARN SINKS. Title - From tarn Sinks the river flows underground for a distance of a little over two miles as the crow flies to come to the surface again at Aire Head Springs situated between the villages of Kirkby Malham and Malham. People are standing near a waterfall. Two are up near the top of the waterfall while there are others around the riverbank. There are shots of the surrounding landscape from across the valley at Malham Cove.