Question: Which composer died first Modest Mussorgsky or William Walton?

Context articles: William Walton
Vyacheslav Nagovitsin
Boris Godunov (opera)
Khovanshchina (film)
The Fair at Sorochyntsi
Night on Bald Mountain
Modest Mussorgsky
Exposition, Eaux-Fortes et Méandres
Mussorgsky (film)
Khovanshchina

Sir William Turner Walton, OM (29 March 19028 March 1983) was an English composer.
 During a sixty-year career, he wrote music in several classical genres and styles, from film scores to opera.
 His best-known works include "Façade", the cantata "Belshazzar's Feast", the Viola Concerto and the First Symphony.
Vyacheslav Lavrent'yevich Nagovitsin (Russian: Вячеслав Лаврентьевич Наговицин ) is a Russian composer born in Magnitogorsk (21 December 1939).
 He was a student of Dmitri Shostakovich at the Leningrad Conservatory that he graduated in 1966 (postgraduate school, he graduated from the undergraduate school of the Conservatory in 1963).
 In 1963-1964 he worked in "Ulan-Ude Opera and Ballet Theater".
 In 1966-1970 he was a lecturer at the Mussorgsky Musical School in Leningrad.
 In 1968-1970 he also worked as the Music Director of the Leningrad Comedy Theatre.
 Since 1970 he became a professor at the Leningrad Conservatory.
 He orchestrated two unfinished operas of Modest Mussorgsky: Zhenitba and Salammbô.
 His orchestration of Salammbô was used by Valery Gergiev at the Mérida festival in 1991.
Boris Godunov (Russian: Борис Годунов , "Borís Godunóv") is an opera by Modest Mussorgsky (1839–1881).
 The work was composed between 1868 and 1873 in Saint Petersburg, Russia.
 It is Mussorgsky's only completed opera and is considered his masterpiece.
 Its subjects are the Russian ruler Boris Godunov, who reigned as Tsar (1598 to 1605) during the Time of Troubles, and his nemesis, the False Dmitriy (reigned 1605 to 1606).
 The Russian-language libretto was written by the composer, and is based on the drama "Boris Godunov" by Aleksandr Pushkin, and, in the Revised Version of 1872, on Nikolay Karamzin's "History of the Russian State".
Khovanshchina (Russian: Хованщина ) is a 1959 Soviet film, released the following year, directed by Vera Stroyeva and based on the eponymous opera by 19th-century Russian composer Modest Mussorgsky.
 For his adaptation of Mussorgsky's score, Dmitri Shostakovich was nominated for an Academy Award for Scoring of a Musical Picture.
 The music was conducted by Evgeny Svetlanov.
The Fair at Sorochyntsi (Russian: Сорочинская ярмарка , "Sorochinskaya yarmarka", "Sorochyntsi Fair") is a comic opera in three acts by Modest Mussorgsky, composed between 1874 and 1880 in St. Petersburg, Russia.
 The composer wrote the libretto, which is based on Nikolai Gogol's short story of the same name, from his early (1832) collection of Ukrainian stories "Evenings on a Farm near Dikanka".
 The opera remained unfinished and unperformed at Mussorgsky's death in 1881.
Night on Bald Mountain (Russian: Ночь на лысой горе, "Noch′ na lysoy gore" ), also known as Night on the Bare Mountain, is a series of compositions by Modest Mussorgsky (1839–1881).
 Inspired by Russian literary works and legend, Mussorgsky composed a "musical picture", "St. John's Eve on Bald Mountain" (Russian: Иванова ночь на лысой горе, "Ivanova noch′ na lysoy gore" ) on the theme of a witches' sabbath occurring on St. John's Eve, which he completed on that very night, 23 June 1867.
 Together with Nikolay Rimsky-Korsakov's "Sadko" (1867), it is one of the first tone poems by a Russian composer.
Modest Petrovich Mussorgsky (Russian: Моде́ст Петро́вич Му́соргский ; ] ; 21 March [O.S. 9 March] 1839 – 28 March [O.S. 16 March] 1881 ) was a Russian composer, one of the group known as "The Five".
 He was an innovator of Russian music in the romantic period.
 He strove to achieve a uniquely Russian musical identity, often in deliberate defiance of the established conventions of Western music.
Exposition, Eaux-Fortes et Méandres is the 8th album released by the French darkwave band Collection d'Arnell Andréa.
 The concept for the album is based on pianist Modest Mussorgsky's 1874 "Pictures at an Exhibition" piano suite, which in Mussorgsky created 10 different piano songs based on Russian artist Viktor Hartmann.
 The majority of the tracks on "Exposition, Eaux-Fortes et Méandres" are based on 19th-century paintings.
 These paintings had darker themes and included works from Arnold Böcklin's "Isle of the Dead", Edward Robert Hughes, and John Everett Millais's "Ophelia".
 The album cover art and title track, "Les Méandres", are based on Richard Boutin's 1999 painting "Crepuscule sur la Loire".
 Boutin also photographed the band for the album's liner notes.
Mussorgsky (Russian: Мусоргский , "Musorgskiy " ) is a 1950 Soviet biopic film directed by Grigori Roshal, about the emergence of Russian composer Modest Mussorgsky.
 It was entered into the 1951 Cannes Film Festival.
Khovanshchina (Russian: Хованщина , "Hovánščina", sometimes rendered The Khovansky Affair; since the ending -ščina is pejorative) is an opera (subtitled a 'national music drama') in five acts by Modest Mussorgsky.
 The work was written between 1872 and 1880 in St. Petersburg, Russia.
 The composer wrote the libretto based on historical sources.
 The opera was unfinished and unperformed when the composer died in 1881.