Society Daughter of tradition, woman of substance February 12, 2008 Charumathi Supraja Widowed in 1913, Amba Bai started teaching at Bangalore from 1942 and retired as head mistress of Vani Vilas High School. Vimala Murthy, her grand-daughter recently published a book on her. She spoke to Charumathi Supraja on Ambi.