This is Hedi Born (wife of Max Born) sending a picture with a note to Lokasundari Ammal (CV Raman’s wife) in 1937.
Max Born and his family spent some time at IISc, Bangalore, in 1935-36.
Amazing to see how communication channels have changed, but the human urge to communicate remains the same..
picture source: (Venkataraman, G.; Journey into Light: Life and Science of C.V. Raman. Indian Academy of Sciences, 1989. p. 364)
VISMAYA - History & Philosophy of Science 