 At LSE, she mentored Eleanora Carus-Wilson.She was made corresponding fellow of the Medieval Academy of America in 1936, she received an honorary D Litt from Mount Holyoke in 1937.In 1937 Power married her pupil and colleague, the historian Michael Postan, Professor of Economic History at the University of Cambridge, having previously been engaged to Reginald Johnston, tutor to the last Emperor of China, Puyi.