Working in chalk pastel, Ms. McQuillen's landscapes, figures, and portraits reflect a reverence for the unspoiled beauty of nature. Her canvas ranges from the stately mesas of the American Southwest to the poetic vistas of the English and French countryside. Ms. McQuillen works on both commissioned and non-commissioned projects. Her paintings are shown in several galleries in the Washington, D.C. area, as well as Martha's Vineyard, Atlanta, Georgia, and Little Washington, Virginia