This was an era of significant change at Mount Stromlo: in January 1956 Woolley had resigned as director of Mount Stromlo to take up a position as Astronomer Royal and director of the Royal Observatory Greenwich. He was replaced by Bart Bok, whom Gascoigne liked and under whose directorship _he_played a significant role. <sep>, Pronoun: he <sep>, A: Bart Bok <sep>, B: Gascoigne