sentences:  His grandfather was a schoolmaster, while his father, John Bruce Lockhart, and one of his older brothers, Rab Bruce Lockhart, were both public school headmasters who had played rugby union for Scotland.Another brother, J. M. Bruce Lockhart, was an intelligence officer, and a third brother, Patrick, was an obstetrician who fenced for Scotland.Lockhart’s uncle, Sir Robert Bruce Lockhart (1887–1970), was an author and adventurer whose son, Robin Bruce Lockhart, became an author.