The worst thing about this war is the chance it gives these dreadful little persons, the chance to make themselves important.

His first major show was The Dairymaids (1906) which was favourably reviewed by The Times though the derivative nature of the plot was noted as was the similarity between the lyrics for the song "Mary in the Dairy" and an earlier Punch magazine parody of a musical comedy number which contained the words "Mary Mary managed a dairy". Wimperis died in Maidenhead Berkshire England at the age of 78. In addition to contributing lyrics or dialogue to other shows he then began adapting Viennese operettas into English.

For 25 years beginning in 1906 he became a librettist and lyricist for musical comedies including the hit The Arcadians in 1909 and many other musicals. Early in his career Wimperis was an illustrator.