 For instance, her large canvas "Women Making Shells" was a powerful painting conveying a scene where women were working in a factory along with men, a novel scene at that time.Soon after that in 1920 she became one of the founders of the Beaver Hall Group, along with Anne Savage, Sarah Robertson and Nora Collyer who shared May's passion for impressionistic painting.As the years went on May's naturalistic approach of colours as soothing rhythmic brushstrokes developed greatly.