 In 1905, Seath submitted some of her oil paintings to the Art Association of Montreal’s spring exhibition.The following year, she participated in the annual exhibition at the Royal Canadian Academy of Arts.In 1917, Seath—having worked a cumulative twenty years as a newspaper illustrator for the "Montreal Witness", the "Star", the "Weekly Star", and latterly the "Family Herald"—was invited to teach at the Montreal all-girls private school, The Study, by her friend and school founder, Margaret Gascoigne.