In 1919, 130 cyclists registered to race in the Tour de France. Only 69 turned up at the start line: the war had made rubber scarce, and many couldn’t find tyres. Riders were instructed to bring their passports with them as they’d be travelling through contested territory, and there wasn’t enough sugar around for the organisers to keep them properly fed. By the time the peloton arrived at the foot of the Pyrenees, only 25 riders were left in the race. Ten made it to the finish line. The last rider to complete the race, Jules Nempon, limped home 21 hours after the winner, Firmin Lambot. Géo Lefèvre, the tour's originator and its most breathless early chronicler, called it ‘the most beautiful Tour de France I have ever seen’.