"Feuilles-Oh/Do Space Men Pass Dead Souls On Their Way To The Moon?", the fifth track of the album, was a combination of the traditional Haitian folk song with a middle section based on the melody of J.S. Bach's "Christmas Oratorio" Choral N°33, and lyrics by Garfunkel's then fiancée, Linda Marie Grossman.
The St Cyprian's Cathedral Choir at this period performed such works as Messiah (Handel), Elijah (Mendelssohn) and Bach's Christmas Oratorio.
Christmas | A Christmas Carol | Christmas Eve | Christmas Island | oratorio | Christmas music | Christmas tree | A Christmas Story | Have Yourself a Merry Little Christmas | Elijah (oratorio) | Christmas Oratorio | How the Grinch Stole Christmas | How the Grinch Stole Christmas! | Christmas lights | Mickey's Christmas Carol | The Nightmare Before Christmas | Merry Christmas Baby | Last Christmas | I'll Be Home for Christmas | Christmas lights (holiday decoration) | Christmas card | All I Want for Christmas Is You (Mariah Carey song) | All I Want for Christmas Is You | Father Christmas | Christmas in July | A Charlie Brown Christmas | The Christmas Attic | Rockin' Around the Christmas Tree | National Lampoon's Christmas Vacation | Julie Christmas |
Throughout his career, Gregory has been a regular concert performer, giving performances in the UK of oratorios and orchestral music, including Bach’s St Matthew Passion, St John Passion, Mass in B Minor, Christmas Oratorio, Elgar’s Apostles, Handel’s Messiah and Britten’s War Requiem.
His activity has been focused on Johann Sebastian Bach; he has transcribed the The Musical Offering for two pianos, the Brandenburg Concertos, the Deutsche Messe and the Canons on the Goldberg ground, BWV 1087; and he reconstructed, performed and recorded the Christmas Oratorio for solo strings, mixed choir and piano by Friedrich Nietzsche.
Among his performances are Mahler’s ”Lieder eines fahrendes Gesellen” with the Academy of St. Martin in the Fields in London, Bach’s ”Christmas Oratorio” with the Drottningholm's Baroque Orchestra in Uppsala and Rossini’s ”Petite Messe Sollenelle” in Köln Philharmonie, Kverno's "St. Matthew Passion" in New York and Manoa in Handel's "Samson" at the London Handel Festival.