 Nicholls was made vice-president of the New York Water Color Club and belonged to the American Society of Miniature Painters and the American Water Color Society.Nicholls served as co-editor of "Palette and Bench".Nicholls taught art from her 7th Avenue studio in New York, at the Art Students League of New York, William Merritt Chase's Shinnecock School of Art on Long Island, and in towns in the eastern United States.