Please answer the following question: Found the following article online, use it to answer the question: Who sighed at the thought of the unhappiness that this failure must cause Saint-Saëns?  In 1861 Saint-Saëns accepted his only post as a teacher, at the École de Musique Classique et Religieuse, Paris, which Louis Niedermeyer had established in 1853 to train first-rate organists and choirmasters for the churches of France. Niedermeyer himself was professor of piano; when he died in March 1861, Saint-Saëns was appointed to take charge of piano studies. He scandalised some of his more austere colleagues by introducing his students to contemporary music, including that of Schumann, Liszt and Wagner. His best-known pupil, Gabriel Fauré, recalled in old age: After allowing the lessons to run over, he would go to the piano and reveal to us those works of the masters from which the rigorous classical nature of our programme of study kept us at a distance and who, moreover, in those far-off years, were scarcely known. ... At the time I was 15 or 16, and from this time dates the almost filial attachment ... the immense admiration, the unceasing gratitude I [have] had for him, throughout my life. Saint-Saëns further enlivened the academic regime by writing, and composing incidental music for, a one-act farce performed by the students (including André Messager). He conceived his best-known piece, The Carnival of the Animals, with his students in mind, but did not finish composing it until 1886, more than twenty years after he left the Niedermeyer school.In 1864 Saint-Saëns caused some surprise by competing a second time for the Prix de Rome. Many in musical circles were puzzled by his decision to enter the competition again, now that he was establishing a reputation as a soloist and composer. He was once more unsuccessful. Berlioz, one of the judges, wrote: We gave the Prix de Rome the other day to a young man who wasn't expecting to win it and who went almost mad with joy. We were all expecting the prize to go to Camille Saint-Saëns, who had the strange notion of competing. I confess I was sorry to vote against a man who is truly a great artist and one who is already well known, practically a celebrity....
A:
Berlioz