الخرطوم بحري
Seamer married Letice Dorothy Lee, and had two children, Katherine Judith and Mary. By 1948 Seamer had risen to be the district commissioner for Khartoum North. When he left the Sudan Political Service in 1950, he returned to England and took up a teaching position at his old school, Marlborough College. In addition to teaching Latin, English and history, he became a housemaster, before his retirement in 1973. He served as mayor of Marlborough twice, and as a justice of the peace, and was awarded Freedom of the City in 2001. He died, following an illness on 16 April 2006, aged 92.