Although we followed that hyena for the best part of half an hour, we never caught up with it.

I have examined the stomach contents of seven aardvarks.

At Olduvai, for 20 years, Mary and I had investigated and made a general survey of the overall geology.

I felt that in time simple stone tools would be found in early Pleistocene in England.

I kept an open mind on the question of whether a hominid had been present in Europe in the early Pleistocene.

We explored about 180 miles of exposures, ranging from a depth of about 300 feet to 50 feet, before we undertook any major digging.

We decided to leave a part of each and every excavated area exactly as we had found it, protecting the specimens from rain and excessive sun.

Our water hole at the camp was little more than a liquid, muddy swamp, in which a rhino wallowed daily and added urine to the puddle.

I withdrew my support for the validity of the evidence for early Pleistocene Stone Age tools in Europe on the grounds of not proven.