A mass of Christian burial was held June 18 at Good Shepherd R.C. Church, Route 517 in Andover Boro for Robert C. Pfeiffer, Sr. 78, of Newton. He died June 15 at Newton Medical Center. Born in Hoboken, Mr. Pfeiffer lived in Union City before moving to Newton in 1997. Mr. Pfeiffer was a 1950 graduate of Weehawken High School. He was employed as a letter carrier for the Union City Post Office, where worked from 1964 1994 when he retired. Mr. Pfeiffer was a United States Army veteran, serving during the Korean War. He was a former Cub Scout Leader, a member and former Secretary/Treasurer of the Post Office Bowling League, in Hudson County and a member of the Good Shepherd Roman Catholic Church in Andover Boro. The son of the late Conrad and Agnes (Stengler) Pfeiffer, Mr. Pfeiffer is also predeceased by his son, Steven A. Pfeiffer. He is survived by his wife of 56 years, Frances; five children, Deborah Mehlfelder and her husband, Greg of North Arlington; Robert Pfeiffer, Jr. of Newton; Michael Pfeiffer and his wife, Darline of Hampton Township; Doreen DeHaas, and her husband, Bill of Andover Boro; and David Pfeiffer and his wife, Courtney, of Ridgewood, and twelve grandchildren. Mr. Pfeiffer is also survived by his brother-in-law, John Cessorsmo of Newton; daughter-in-law, Laurie Pfeiffer of Andover Boro. Services arranged by the Smith-McCracken Funeral Home, Newton.