An otherwise undistinguished career was interrupted by World War II, when he worked as a draughtsman for the Air Ministry while perfecting his gift for drawing cartoons. From 1939 until the 1950s, and less frequently in the 1960s, he published regularly in "Punch" and for many years when his work was published elsewhere it was credited to "Emett of Punch". His cartoons were seldom political, except when he caricatured bureaucratic absurdities, and his early subjects typically found humour in the difficulties of life in Great Britain during the second World War. His drawings soon started to include railway scenes and he gradually developed a unique concept of strange, bumbling trains with excessively tall chimneys and silly names.