Five Weeks in a Balloon by Jules Verne

A struggle of generosity -- The last sacrifice -- The dilating apparatus -- Joe's adroitness -- Midnight -- The doctor's watch -- Kennedy's watch -- The latter falls asleep at his post -- The fire -- The howlings of the natives -- Out of range.

Doctor Ferguson's first care was to take his bearings by stellar observation, and he discovered that he was scarcely twenty-five miles from Senegal.