The MNRC made a preliminary investigation of Bridged Pot Shelter in 1925, and this site was to occupy them over the next four years, as they progressively reached a depth of fifteen feet. This attention was justified as the Shelter yielded the most important series of finds at Ebbor. In successive years they found pottery, a polished stone axe and flint knife, a hoard of eleven magnificent flint implements, and a wide range of animal bones particularly a fine collection of birds and small mammals including the pika. Thus the following periods are represented at the shelter: Romano-British, Bronze Age and Neolithic, with Pleistocene fauna below (Balch 1925, 1926, 1927, 1928 and 1929). In the course of this work they had uncovered the natural rock bridge across the front of the shelter which gave it its name.
In 1931 the MNRC turned their attention to a site on the hillside above Bridged Pot Shelter. In the first eighteen inches below the surface they found a number of flint scrapers. They then encountered a floor of small limestone flagstones, and below this a human femur and small foot and ankle bones. They continued digging to a depth of over six feet although the sediment became barren (Balch 1931). This site has come to be known as Beaker Shelter.
After this time, the MNRC�s practically annual digs at Ebbor, religiously written up in their yearly report by Balch, which had prolonged from 1907 to 1931, appear to come to an end. Wells Museum conserves human bones from Upper Ebbor, presumably Savory�s Cave, found by Eric Bird in 1937 and 1939. During the Second World War the Army had an Auxiliary Unit Base (PRN 25668) or ammunition store hidden in the gorge. However, Wells Museum has a long bone, in a poor state of conservation, marked �Outlook Cave 1943�. Soon after the war, Balch published the third edition of Mendip � The Great Cave of Wookey Hole, with photos and descriptions of finds from Ebbor (Balch 1947).
