Bax had introduced him to the Rationalist Press Association ( RPA ) , which Robertson joined in 1920 .
In 1919 he met his old hero Belfort Bax , and after the latter 's death in 1926 Robertson wrote a pamphlet of appreciation .
Belfort Bax had introduced Robertson to the Rationalist Press Association ( RPA ) , which Robertson joined in 1920 .
In 1919 he met his old hero Belfort Bax , and after the latter 's death in 1926 Robertson wrote a pamphlet of appreciation .