 Walker also presented Gilbert and Sullivan with Roberts in two-person entertainments throughout the United States and Canada beginning in the 1950s.President Eisenhower asked them to give their concert programme at his pre-inauguration party at the White House following his re-election in 1956, but they were unable to attend, as they were then in Australia.Walker was the Honorary President of the Gilbert and Sullivan Society of New York from 1951 until his death.