ComradesM-package       ComradesM: Runtime and race information data
                        analysed in Chapter 21, "Over 90 years running
                        90 km", of "Getting (more out of) Graphics"
cmAll                   Results of the Comrades Marathon race from 1921
                        to 2019
cmDist                  Distances run in the Comrades Marathon race
                        from 1970 to 2019
cmE                     Elevations along the Comrades Marathon route
