Larry Roberts is dead.
New York Times reports:
Lawrence Gilman Roberts was born on Dec. 21, 1937, in Westport, Conn., the youngest of three children. His parents, Elliott and Elizabeth, were both chemists who had met in the Yale University chemistry department while pursuing their doctorates.
https://www.nytimes.com/2018/12/30/obituaries/lawrence-g-roberts-dies-at-81.html