Born: April 29, 1718, Perth, Perthshire, Scotland.
Died: April 2, 1771, Danbury, Connecticut.
Buried: Wooster Street Cemetery, Danbury, Connecticut.
Robert was the son of David Sandeman and Margaret Ramsay, and husband of Catherine Glas (married 1737). His father was a city magistrate in Perth (1735–63).
Robert was Independent minister, leading a sect known as the Glassites or Sandemanians.