 Under headmaster Philip Wayne it developed artistic activities, acquired shared use of playing fields in Sudbury Hill, and established a country base in the village of Forest Green, near Leith Hill.In 1957 the motto "ex animo tamquam Deo" ("from the heart, as from God") was added to the school's crest at the suggestion of the deputy headmaster Kenneth Crook.After Philip Wayne, SMGS was led by Harry Llewellyn-Smith as headmaster until 1970.