f: ^MHKg^Piederick Nolan j|fHarrington Avenue, West Concord observed his 20th anniversary asan officer on the Concord police He-trolman |Iolan, one of the best liked men in the local department is a day officer on the Mill pant beat. He is only outranked in seniority by his chief, William G-Ryan, who, in April, will have beena member of the Concord police department for 21 years. Officer Nolan is married and has four children ahl is active in many organizations of the town.