Janet Mitchell     Philbrick     SCARBOROUGH -- Janet Mitchell Philbrick of Piper Shores, Scarborough, died suddenly on March 30, 2008.      The daughter of William A. Mitchell and Georgie Brown Mitchell, Janet was born on Aug. 28, 1927, in New Jersey. She was the widow of Donald Philbrick of Portland. She attended Abbot Academy, now Phillips Andover Academy in Connecticut, and graduated from Smith College in the class of 1949. She also had a graduate degree in Occupational Therapy from Columbia University. Janet was very successful in her work for many years as an Occupational Therapist at the Cerebral Palsy Center in Portland, where she was able to help innumerable children and adults. Janet was first married and divorced from Burnell Poole Jr. Her son Burnell Poole III, predeceased her as did her sister, Mrs. Elizabeth Gort. She is survived by her daughter, Dr. Lindsay Johnson of Santa Cruz, Calif., her son, Robert Poole of Beijing, China, and her son David Poole, of Portland. Her brother, David L. Mitchell of New York City, survives her; as well as her three granddaughters, Logan, Sally and Nina Poole of Chicago, and her grandson, Henry Johnson of Santa Cruz.      Janet took up study of the trumpet in recent years, and sometimes performed with her son David in jazz performances. In addition to her past work as a docent in the Portland Museum of Art, Janet did considerable volunteer work in the Portland area, particularly for the mental health community.      A memorial service will be held for Janet 11 a.m. Saturday, April 5, 2008, at the State Street Church in Portland, officiated by the Rev. Jeannette A. Good. A reception will follow the service at Piper Shores. Arrangements made by the Hobbs Funeral Home, 230 Cottage Rd., South Portland.