Here, she was attracted to the Eastern spirituality and started learning Sanskrit in order to study Hindu philosophy.
[1] Curious about India, Biardeau joined the University of Travancore for two years in the 1950s, and studied Sanskrit texts with pandits.
She visited India almost every year until the 1990s, and worked closely with pandits at the Deccan College (Pune) and the French Institute of Pondicherry.
She visited places of worship in towns and villages, surveying people from different castes and collecting information about the various cults and rituals.
She wrote her doctoral dissertation on The Theory of Knowledge and the Philosophy of Speech in Classical Brahmanism in 1964 (in French) The Hindu epics constituted a main area of Biardeau's scholarship.