the period of The Earl of Willingdon was 18 April 1931 to 18 April 1936
and period of round table conference given below

First Round Table Conference (November 1930 – January 1931)
Second Round Table Conference (September – December 1931)
Third Round Table Conference (November – December 1932)

The Earl of Willingdon 18 ഏപ്രിൽ 1931-18 ഏപ്രിൽ 1936

Lord Wellington