Placide Cappeau was the author of "O Holy Night" which was set to music by what French composer and music critic
Adolphe Adam Adolphe Charles Adam (] ; 24 July 1803 – 3 May 1856) was a French composer and music critic. A prolific composer of operas and ballets, he is best known today for his ballets "Giselle" (1841) and "Le corsaire" (1856, his last work), his operas "Le postillon de Lonjumeau" (1836), "Le toréador" (1849) and "Si j'étais roi" (1852)
Joseph d'Ortigue Joseph Louis d'Ortigue (22 May 1802 – 20 November 1866) was a French musicologist and critic. A specialist in liturgical music and a conservative Catholic of ultramontane and royalist leanings, he was a close friend of both Berlioz and Liszt. His most influential work was "Dictionnaire liturgique, historique, et theorique de plain-chant et le musique d'église", but he was also wrote for many of the most prominent periodicals of the day, including "Journal des débats" and "Le Ménestrel" where he was the editor-in-chief from 1863 until his sudden death at the age of 64.