The Corbett Almanac 2nd edition Available to Purchase

Hill walking is a pursuit followed by many. However, not everyone has the stamina, or wish, to climb a Munro every weekend. The Scottish hills of between 2,500ft and 2,999ft tend to be the most popular and accessible for hillwalkers. These hills were named Corbetts after John Rooke Corbett who was the first to collate them all together in tabular form. Corbett was very strict in determining what constituted a separate mountain insisting that there be a re‐ascent of 500ft on all sides between each listed hill and any neighbouring one.

Thus the Corbetts are quite distinct and separate hills...