I have stood several times in front of an (apparently) plain white, chalk cliff-face along with others, while Prof Mortimore discussed the implications of what we were seeing. And, every time, I left not just thinking but knowing this was the most fascinating piece of geology I had ever seen. That is it the man.

This was the first GA guide I ever bought, and I suspect it is still the best. My copy is more than well-thumbed and water-damaged, through many a happy trip to the south of England to collect, what a friend describes as “white fossils in white rock”.

In recent years, there has been a lot written on the fossils of the UK Chalk. However, this guide was the first and is still probably the best for identifying and learning about the fossils that can be found in the chalk cliffs and pits of the UK.

I have to admit, I was beginning to wonder where Prof Rory Mortimore’s update of his excellent Chalk of Sussex and Kent was. And now I know. It wasn’t a second edition he was working on, but this magnificent magnum opus in two volumes covering a vastly greater area than that other guide. And the wait was more than worthwhile. The thoroughness, writing quality, content and publication standards are superb.