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Agnus Deianonymous SourcesLondon: British Library, Additional 40011B (Fountains fragments), fol. 12v (3/3); British Library, Additional 49597, fol. 2 (3/3); British Library, Additional 57950 (olim Old Hall, Library of St. Edmund's College), fol. 104v-105 (3/3).Facsimiles1. English Fourteenth-Century Polyphony: Facsimile Edition of Sources Notated in Score, edited by William J. Summers, Tutzing: H. Schneider, 1983. Münchner Editionen zur Musikgeschichte IV, plate 84., plate 88., plate 138.2. The Fountains Fragments, facsimile edition by Margaret Bent, Clarabricken: Boethius Press, 1987, plate 20. Editions1. The Old Hall Manuscript, edited by Alexander Ramsbotham, completed by H.B. Collins and Dom Anselm Hughes, 3 vols., Nashdom Abbey, Burnham, Buckinghamshire: Plainsong and Medieval Music Society, 1933-1938, Vol. III, p. 120.2. The Old Hall Manuscript, edited by Andrew Hughes and Margaret Bent, 3 vols., American Institute of Musicology, 1973. Corpus Mensurabilis Musicae 46, Vol. I, p. 391.    | 
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