In Nancy, he was introduced to hypnosis (under Hippolyte Bernheim), in Strasbourg he got in contact with methods of microscopic research of the nervous system (under Albrecht von Bethe).
Louis-Hippolyte Lafontaine | Hippolyte Taine | Hippolyte et Aricie | Hippolyte Bernheim | Louis-Hippolyte LaFontaine | Hippolyte Lefèbvre | Hippolyte François Jaubert | Hippolyte Fizeau | Hippolyte Cloquet | Bernheim Arboretum and Research Forest | Saint-Hippolyte, Haut-Rhin | Saint-Hippolyte-du-Fort | Saint-Hippolyte | ''Phèdre et Hippolyte'' by Baron Pierre-Narcisse Guérin | Louis-Hippolyte Boileau | Isaac Wolfe Bernheim | Hippolyte Roussel | Hippolyte Mège-Mouriès | Hippolyte Louis Gory | Hippolyte Havel | Hippolyte Girardot | Hippolyte d'Este | Hippolyte de la Charlerie, detail from ''The Members of the Société Libre des Beaux-Arts | Hippolyte Bis | Hippolyte Annex | Hippolyte | François-Hippolyte Barthélémon | Étienne Laurent Joseph Hippolyte Boyer de Fonscolombe | Anne Joseph Hippolyte de Maurès, Comte de Malartic |
During this creative phase Baldwin travelled to France (1892) to visit the important psychologists Charcot (at the Salpêtrière), Hippolyte Bernheim (at Nancy), and Pierre Janet.
He also directly observed the work of Hippolyte Bernheim (1840–1919) in Nancy, Jean-Martin Charcot (1825–1893) at the Salpêtrière in Paris, Frederik Willem van Eeden (1860-1932) and Albert Willem van Renterghem (1846-1939) in Amsterdam, Ambroise-Auguste Liébeault (1923-1904) in Nancy and Otto Georg Wetterstrand (1845–1907) in Stockholm, at their respective clinics.