But he studied deeply the arts of speaking and gesture, and he was a past master in them.
I once attended a course he gave in these subjects.

He stated highly illuminating truths and gave the psychological reasons for accents and the physiological reasons for the gestures.

He determined the use of gestures in some sort of scientific way.

Mystic fancies were mixed up in these questions.
It was extremely interesting to see him dissect one of Fontaine's fables or a passage from Racine, and to hear him explain why the accent should be on such a word or on such a syllable and not on another, to bring out the sense.

Although this course was so instructive, few took it, for Delsarte was almost unknown to people.