Patricia R. Davis, 67     SEBAGO -- Patricia R. Davis, 67, of Northwest River Road died Wednesday, April 9, 2008, at her home after a brief illness.      Born in Danvers, Mass., she was the daughter of Francis and Ruth McCarthy Marquis. She has resided here for the past 20 years and had been a real estate broker's assistant for Agency 1 here in Sebago. For many years, she enjoyed traveling in the family motor home.      In addition to her parents, Mrs. Davis was predeceased by her step-mother, Helen (Gokas) Marquis; and a brother, Richard Marquis. Surviving her are her husband, Donald J. Davis of Sebago; a daughter, Dawn M. Bonfanti and her husband Lenny of Middleton, Mass., a son, Daniel J. Davis and his wife Lori-Ann of Fremont, N.H.; a brother, Edward Marquis of Salem, Mass.; three grandchildren and several nephews.      Visiting hours will be held from 3-5 p.m. Sunday, April 13, 2008, at the Dolby and Dorr Funeral Chapel, 76 State St., Gorham. A Mass of Christian Burial will be held at 10 a.m. Monday, April 14, 2008, at St. Anne's Catholic Church, Main St., Gorham. The Rev. Lawrence Conley will officiate. Interment will be later in the spring.