Written for my friend Georges, this score should be easier to play that the aria in G that Georges arranged for pedals and performed on his 4 manuals organ.
This piece can suit to a small organ. You only need a 49 keys manual with a soft stop in 8' and a trumpet 8' for your 27 notes pedalboard. It may be a stop of the pedal or a tumpet belonging to swell coupled to pedals. In organ solo passages you can add a flute 4".