Motet for SSATB, org
Source: Westminster Abbey Library: a loose set of sheets dating from the 1730s on Venetian paper in Lotti's own hand. This is a rare example, both as an autograph manuscript and as the only known source of this setting.
All the other Crucifixus motets can all be traced to a complete Credo, whereas no Credo has been found containing this piece. This manuscript has only recently been identified as an autograph.