On June 14th and 15th 1904, Martel visited the caves at Cheddar and Wookey Hole and also saw other cave entrances and karst features on the Mendip Hills in Somerset. He noted particularly the way that caves there were entered by digging, the significance of the Dolomitic Conglomerate in determining the age of some of the caves and the subsidence of Wells Cathedral supposedly caused by St. Andrews Well. His visit is examined in the wider context of his deliberate ‘internationalisation’ of cave studies.