||Fragment of an organ mass
|Composer Time PeriodComp. Period
Possibly from the 1560s manuscript copy mentioned here (line 19) (name shown only as mr Redford in the manuscript, title as Agnus [Dei].) Only one Agnus Dei "organ mass" movement is mentioned e.g. by Cox in "English organ music to c.1700", see this page, so probably the same.