Dane Coombe is now called Deancombe. The Dane/Dean Combe Brook is now called the Narrator Brook.
Crossing tells us in his //Guide to Dartmoor// that the caves were probably made by the tin miners and may have been the location of an illegal still for distilling alcohol. He also says that local farmers later used the caves to store potatoes.
The photograph was taken with magnesium light inside the cave.