Pieces number 40 to 46 are parts of two Salve Regina. The first one has only 2 versets (40-41). The writing of piece 40 demands another organ with an independant pedal. Others pieces are mostly written for a single manual organ with divided stops and short octave.
Salve Regina 1
40
M : Vox Humana
B : G8, F4, N, Sif 1
P : M + B
41
B : G8 N
P + M : Vox H + Tremulant
Salve Regina 2
42
M : Q16 RF8 O4 Mixt + B
B : F4, O2