Laetentur coeli = (Be glad ye heavens) S.A.T.B.B. - Byrd, William 1543-1623; Byrd, William 1543-1623; Byrd, William 1543-1623 (Oxford Univ. Pr., 1973)
Quelle: Liber primus sacrarum cantionum (1589) Nos. 28-29. Oxford. Christ Church. MSS 984-8 (1580a)