P-BRad (Braga) Arquivo Distrital Pastas de fragmentos, 210 (olim Caixa 289, nº 6)
Within the first communio of fol. Ar "Vos qui secutis estis me" (GR reference: 448) it has been interpolated a verse from the Evangelium secundum Matthaeum (19,28), but with some adjustments.
The notation of this fragment does not convey modal information. However, some letters (C, F, B and G) can be found at the beginning of some chants. These letters were written in red or brown ink and they seem to be later additions.
P. Avelino de Jesus da Costa refers to this fragment as: "Caixa 289, 194 – Número 6 – Tombo de São Mamede de Lindoso, 1574".
COSTA Avelino de Jesus da, Pergaminhos Medievais: Inventário Ideográfico e Bibliográfico (9.vols), Braga, Seminário de Nossa Senhora da Conceição, 1944. ALTE da VEIGA, Diogo, O Alleluia na monodia litúrgica em Portugal até 1600: comparações melódicas, Master’s Dissertation (Universidade Nova de Lisboa, November 2009).