Edward Twiss Dunlap, 84, a retired architect with the Army Quartermaster General Corps, died Sept. 25 at his home in Bethesda after a heart attack.

Mr. Dunlap retired in 1966 after a 40-year career as a government architect, the last 15 years with the Memorial Division of the Quartermaster General Corps.

Earlier he had worked for the Veterans Administration, the Treasury Department and the General Services Administration.

He was born in Buffalo and moved to Washington when he was a child. He was a graduate of the old Central High School and attended the University of Virginia and George Washington University.

Mr.Dunlap was a member of the American Institute of Architects, the Society of American Registered Architects, the Cosmos Club, the Potomac Hunt Club and Farmington Country Club. He had been a Boy Scout leader and was a former vestryman at St. John's Episcopal Church in Lafayette Park.

His first wife, the former Eleanor Saunders, died in 1966. Survivors include his wife, Mary L. Swerkes of Bethesda; four children by his first wife, Edward S., of Rockville, Richard S., of Atlanta, Virginia Briscuso of Potomac, and Katherine Ward of Winchester, Va.; two brothers, Douglas, of Bethesda and Donald, of Kensington; a stepson, Henry V. Swerkes of North Ridge, Calif.; 13 grandchildren and three great-grandchildren.