In the first of this multi-part series featuring audio from past IHS symposia, John Barrows (1913-1974) gave what sounds like a masterclass at The First Annual French Horn Workshop, held at Florida State University in 1969. At some point during the session he took questions from the floor. 
Episode Highlights
mouthpieces, Conn 8Ds, and Verne Reynolds
mouthpieces, his own playing, and Geyer horns
bore and playing styles
Bruno Jaenicke (1887-1946) and famous recordings of the time
playing style, hand stopping