Githa Sowerby's first full-length play, Rutherford and Son, was received in 1912 as a work of major importance. After this initial success, however, she produced only a handful of plays, only one more of which reached print. Her plays deftly exploit realist techniques to address social and economic problems, often from a feminist perspective. She began her writing career with a number of books for children (illustrated by her sister Millicent), as well as some plays for young audiences. She also supplied the lyrics for a few songs composed by F. Paolo Tosti.