In the summer of 1929, from April to October, she moved her work to the Pasteur Institute of India in Coonoor (where Sir Robert McCarrison was Director of Nutrition Research), and in early 1931 she was working at the Caste and Gosha Hospital in Madras. In each of the summers of 1930, 1931 and 1932 she returned to England for a few months and continued her work in the pathology laboratories at the Royal Free. She was back at the Royal Free full-time in 1933, but there was another ten-week working visit to the Haffkine Institute from November 1937 to early January 1938.