At Pin Hole we uncovered a rich sequence of bones spanning several periods of cold climate. I relied on my colleague Wilfrid Jackson at Manchester to identify most of this material. Various other specialists looked at the bones from fish and birds, the charcoal, and the engraved bone and the bone tools.
The stone tools, I believe, indicate five periods of cave use by Man. Three of these were Middle Palaeolithic when artefacts were made of flint and quartzite. These were found in the lower cave-earth. The different occupation layers are separated by slabs of limestone which indicate a very cold climate. Above the yellow cave earth, we excavated the red cave-earth finding Upper Palaeolithic flint artefacts in two horizons as well as the bones of reindeer, mammoth, woolly rhinoceros, arctic fox and arctic hare.