Short, artificially-waved hair was a popular style for women during the 1920s and 1930s. Waves could be created using heated curling irons or simply by using the fingers and a comb on wet hair. Curling irons were first developed in the 1870s in France by François Marcel Grateau, and the effect created by them became known as the Marcel Wave. Waves created by the alternative method were known as finger waves.
Click here to see a picture of the young Daphne du Maurier with a Marcel Wave.
Click here to see some more elaborate 1930s hairstyles.