Question: Placide Cappeau was the author of "O Holy Night" which was set to music by what French composer and music critic
Context: Ernest Newman (30 November 1868 – 7 July 1959) was an English music critic and musicologist. " Grove's Dictionary of Music and Musicians" describes him as "the most celebrated British music critic in the first half of the 20th century."  His style of criticism, aiming at intellectual objectivity in contrast to the more subjective approach of other critics, such as Neville Cardus, was reflected in his books on Richard Wagner, Hugo Wolf, Richard Strauss and others.  He was music critic of "The Sunday Times" from 1920 until his death nearly forty years later. Placide Cappeau (October 25, 1808 – August 8, 1877) was a French poet and the author of the well-known poem, "Minuit, chrétiens" ("O Holy Night") (1847), which was set to music by Adolphe Adam. Edward Holmes (1797 – 28 August 1859) was an English musicologist, music critic, pianist, and music educator.  Born just outside London, he was a pupil of Vincent Novello.  He spent his early career earning a living as a piano teacher.  In 1827 he visited Germany, and upon returning to England published his first book, "A Ramble among the Musicians of Germany" (1828; 3d ed.  1838).  Impressed with his skills as a writer on music, the owner "The Atlas" hired him as a music critic where he remained for many years.  In 1849 he immigrated to the United States where he spent the last 10 years of his life working as an editor and music critic.  He also contributed articles to several music journals during his career, including "The Musical Times".  His other works include "The Life of Mozart" (1845), "Life of Purcell", for Novello's 'Sacred Music', and "Analytical and Thematic Index of Mozart's Piano-works". 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) Emilie Frances Bauer (pseudonym: Francisco di Nogero; March 5, 1865 Walla Walla, Washington – March 9, 1926 Manhattan, New York) was an American music critic and pianist.  She studied music with her father, Jacques Bauer (1834–1890), Miguel Espinosa in San Francisco, and at the Paris Conservatoire.  She taught piano in Walla Walla and Portland Oregon.  She was a music critic for "Portland Oregonian," editor for the "Musical Courier," music teacher in Boston (1896), editor for "The Musical Leader" (1900–1926), editor of a women's page in "The Etude" (1902–1903), critic for the "New York Evening Mail" (1906-1912), weekly contributor to the "San Francisco Chronicle," "Portland Oregonian" and the "Concertgoer."  She was the sister of composer Marion Bauer. "O Holy Night" (French: "Cantique de Noël" ) is a well-known Christmas carol composed by Adolphe Adam in 1847 to the French poem "Minuit, chrétiens" (Midnight, Christians) by a wine merchant and poet, Placide Cappeau (1808–1877). Bernard Holland (born 1933) is an American music critic.  He served on the staff of "The New York Times" from 1981 until 2008 and held the post of chief music critic from 1995, contributing 4,575 articles to the newspaper.  He then became the National Music Critic, reviewing concerts, festivals and hall openings worldwide. Joseph Bennett (29 November 1831 – 12 June 1911) was an English music critic and librettist.  After an early career as a schoolmaster and organist, he was engaged as a music critic by "The Sunday Times" in 1865.  Within five years he was appointed chief music critic of "The Daily Telegraph", a post he held from 1870 to 1906. William Bender (May 30, 1930 – May 4, 2014) was an American music critic who reviewed for the "American Record Guide".  A former music critic with the "New York Herald Tribune" and the "World Journal Tribune", he was chief music critic for "Time" magazine from 1968-1978.  He is the author of the Emmy Award winning documentary on Leopold Stokowski which aired on the National Educational Television and BBC networks in 1970.  He is the co-author of the 1974 book "The Tenors" in which he profiled the life and career of opera singer Richard Tucker. Paul Griffiths was born in the Welsh town of Bridgend to Fred and Jeanne Griffiths.  He received his BA and MSc in biochemistry from Lincoln College, Oxford, and from 1971 worked as a freelance music critic.  He joined the editorial staff of "The New Grove Dictionary of Music and Musicians" in 1973 and in 1982 became the chief music critic for "The Times", a post which he held for ten years.  From 1992 to 1996, he was a music critic for "The New Yorker", and from 1997–2005, for "The New York Times".  A collection of his musical criticism for these and other periodicals was published in 2005 as "The substance of things heard: writings about music", Volume 31 of "Eastman Studies in Music".
Answer: Adolphe Adam