A.G. Gardiner is one of the best essayists of the world. He describes ordinary things in an extraordinary interesting manner. 'A Fellow Traveller' is a fine specimen of his personal essay. He describes that travelling alone in a railway compartment is very pleasant. That night there was a mosquito who became the fellow-traveller of the author. The mosquito made him feel that both of them in the world is fellow- travellers and the future of the both is uncertain.