||No 18. from Players cigarette cards, second series of 25, 'Polar Exploration'. The front shows two men and a loaded sledge, one kneeling with a theodolite, captioned: 'Player's Cigarettes COMMANDER EVANS TAKING OBSERVATIONS'. Reverse: 'Commander Evans (second in command) Taking Observations. All the surveying and navigating work was carried out by means of specially designed theodolites. These instruments were marvelously accurate, although so light and compact. The explorers were able to fix their position to within a quarter of a mile. In addition to measuring angles and taking sights, a special "trough compass" was fitted, which enabled the magnetic variation to be determined with a fair degree of accuracy.'