 Various attempts were made pass this obstacle, at first using explosives and then by diving.Initial attempts were unsuccessful and Balcombe's attentions moved to Wookey Hole where standard diving dress was used to explore upstream from the limit of the Show Cave at Chamber 3 as far as the Seventh Chamber.During the Second World War, Balcombe was stationed in Harrogate, North Yorkshire, where he continued to develop his diving equipment, which was put to use at local sites such as Alum Pot, Keld Head and Goyden Pot.