And basically everything we know about percussion, which you can think of as an ultrasound of its day — organ enlargement, fluid around the heart, fluid in the lungs, abdominal changes — all of this he described in this wonderful manuscript "Inventum Novum," "New Invention," which would have disappeared into obscurity, except for the fact that this physician, Corvisart, a famous French physician — famous only because he was physician to this gentleman — Corvisart repopularized and reintroduced the work.