 However, in 1933 Ridder moved to Vancouver as the orchestra's concert offerings began to expand significantly.Shortly after moving to that city he formed the chamber group the Allard de Ridder Chamber Music Quartette which he actively directed and performed with during the 1930s.In 1934 he established a summer concert series for the VSO at the newly built Malkin Bowl in Stanley Park, a venue which he was instrumental in convincing William Harold Malkin to build.