Mary Brown Hamingson, known to all as Sandy, died on August 6, 2015. Born Mary Elsie Dunn in Terre Haute, IN on January 6 1923, she was the only child of Della and William Dunn. In 1946, she married Donald G. Brown, who died in 1985. They had three daughters, Beverly Louise Brown of London, England, the late Elizabeth Brown Pryor, and Peggy A. Brown of Philadelphia. In 1989 she married Donald F. Hamingson, who died in 1998. A graduate of Purdue University, Sandy was an architectural historian, specializing on New Jersey. She was co-author of Gateways to Architecture in Union County, New Jersey and a co-founder of Preservation New Jersey. She lectured throughout the state at various universities, the Newark Museum, and the South Orange-Maplewood Adult School. She was one of New Jersey's representatives to the National Trust for Historic Preservation and served on the board of advisors as regional vice-president. She was also an active docent and member of the board of trustees at Drumthwacket, the governor's residence. A Memorial Service will be held 11:00 am on Thursday, August 20, 2015 at Christ Church 561 Springfield Avenue, Summit, NJ. Arrangements are under the direction of the Mather-Hodge Funeral Home, Princeton.