In a self-organised concert in 1862, his operetta "Le Capitaine Roche" and the Piano Trio, Op. 14 were performed. At the London International Exhibition in the same year, Pfeiffer performed the piano part in his own Second Piano Concerto. Like his Franco-Irish friend Joseph O'Kelly, Pfeiffer was a partner in the piano and harp making firm Pleyel, Wolff, Lyon &amp; Cie. Pfeiffer's piano work "Babillage", Op. 74 is dedicated to O'Kelly's second wife, Marie. In mid- to late nineteenth-century Paris, he was much in demand as a pianist in chamber music events, performing in high-profile recitals with Pablo Sarasate, Auguste Franchomme, and others.