I was hunting for something for Easter this year, and my sincere gratitude to Agnus_Dei for uploading this last year, what a treat to work it up and I hope you enjoy this version :) Listen to the original here (including score and further biographical information):
https://www.contrebombarde.com/concerthall/music/38757
Charles William Pearce (1856-1928) was born in Salisbury, and after studies with W. S. Hoyte (All Saint's Church, Margaret St., London) and E. J. Hopkins (Temple Church, London), he received his doctorate from Cambridge in 1884. He was a professor of harmony, counterpoint and composition at Trinity College in London, and later became Dean the College
The "Phantasy on the Easter Plainsong "O Filii et Filiae.'" was published in 1920 by Winthrop Rogers, it is dedicated: "To his old friend John Warriner Mus. D. and the members of the London Society of Organists."
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O filii et filiae is a hymn celebrating Easter. It was written by Jean Tisserand, O.F.M. (d. 1494) John Mason Neale wrote, "It is scarcely possible for any one, not acquainted with the melody, to imagine the jubilant effect of the triumphant Alleluia attached to apparently less important circumstances of the Resurrection. It seems to speak of the majesty of that event, the smallest portions of which are worthy to be so chronicled."