 At seventeen, she found work as a commercial illustrator for the "Montreal Witness", and later joined the art staff at the "Montreal Star" in 1901.With the influence and encouragement of her mentors, the "Montreal Witness’s" caricaturist, Arthur G. Racey and political cartoonist, Henri Julien, within two years of working at the "Montreal Star", Seath’s illustrations experienced a rapid improvement.Bolstered by her success in her chosen profession, Seath attended William Brymner and Maurice Cullen’s summer plein air sketching classes at the Art Association of Montreal.