Baillot travelled again, visiting the Netherlands, Belgium, and England, and then he became leader of the opera band in Paris and of the royal band. In March 1825, while serving as concertmaster of the Paris Opéra, Baillot and Luigi Cherubini evaluated Felix Mendelssohn's application for admission to the Paris Conservatory by playing his Quartet for Piano and Strings in B minor. Mendelssohn was only 16 years old. An anecdote mentioned that, overcome with emotion, Baillot approached the young composer after the performance and, without uttering a word, simply embraced him.